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87400792401 = 31323385911197
BaseRepresentation
bin101000101100101111…
…1100100000101010001
322100121010000021121020
41101121133210011101
52412444100324101
6104052410150053
76212605322556
oct1213137440521
9270533007536
1087400792401
1134080517a3a
1214b32422329
13831b498c10
144331a24a2d
1524180a6136
hex14597e4151

87400792401 has 32 divisors (see below), whose sum is σ = 126195189120. Its totient is φ = 53487143424.

The previous prime is 87400792399. The next prime is 87400792403. The reversal of 87400792401 is 10429700478.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87400792399) and next prime (87400792403).

It is not a de Polignac number, because 87400792401 - 21 = 87400792399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87400792403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7800135 + ... + 7811331.

It is an arithmetic number, because the mean of its divisors is an integer number (3943599660).

Almost surely, 287400792401 is an apocalyptic number.

It is an amenable number.

87400792401 is a deficient number, since it is larger than the sum of its proper divisors (38794396719).

87400792401 is a wasteful number, since it uses less digits than its factorization.

87400792401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12305.

The product of its (nonzero) digits is 112896, while the sum is 42.

It can be divided in two parts, 87400 and 792401, that added together give a triangular number (879801 = T1326).

The spelling of 87400792401 in words is "eighty-seven billion, four hundred million, seven hundred ninety-two thousand, four hundred one".

Divisors: 1 3 13 39 233 699 859 2577 3029 9087 11167 11197 33501 33591 145561 200147 436683 600441 2601911 2608901 7805733 7826703 9618223 28854669 33915713 101747139 125036899 375110697 2241045959 6723137877 29133597467 87400792401