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87423143153 = 138731630163
BaseRepresentation
bin101000101101011010…
…0110100110011110001
322100122200001211001212
41101122310310303301
52413020311040103
6104054525205505
76213266312243
oct1213264646361
9270580054055
1087423143153
11340920a3435
1214b39a00895
138322cc3308
1443349a2093
15241a01d7d8
hex145ad34cf1

87423143153 has 4 divisors (see below), whose sum is σ = 87423912048. Its totient is φ = 87422374260.

The previous prime is 87423143131. The next prime is 87423143201. The reversal of 87423143153 is 35134132478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87423143153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87423143153.

It is not an unprimeable number, because it can be changed into a prime (87425143153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176351 + ... + 453812.

It is an arithmetic number, because the mean of its divisors is an integer number (21855978012).

Almost surely, 287423143153 is an apocalyptic number.

It is an amenable number.

87423143153 is a deficient number, since it is larger than the sum of its proper divisors (768895).

87423143153 is a wasteful number, since it uses less digits than its factorization.

87423143153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768894.

The product of its digits is 241920, while the sum is 41.

The spelling of 87423143153 in words is "eighty-seven billion, four hundred twenty-three million, one hundred forty-three thousand, one hundred fifty-three".

Divisors: 1 138731 630163 87423143153