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87913067879 = 7132591372859
BaseRepresentation
bin101000111100000000…
…1101111010101100111
322101220210221120110002
41101320001233111213
52420021221133004
6104215310051515
76231365514230
oct1217001572547
9271823846402
1087913067879
11343136a90aa
1215055aa9b9b
1383a065b4c0
14437da94087
15244804661e
hex147806f567

87913067879 has 16 divisors (see below), whose sum is σ = 108242749440. Its totient is φ = 69530559840.

The previous prime is 87913067843. The next prime is 87913067881. The reversal of 87913067879 is 97876031978.

It is not a de Polignac number, because 87913067879 - 236 = 19193591143 is a prime.

It is a super-3 number, since 3×879130678793 (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87913067479) 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 15 ways as a sum of consecutive naturals, for example, 49352 + ... + 422210.

It is an arithmetic number, because the mean of its divisors is an integer number (6765171840).

Almost surely, 287913067879 is an apocalyptic number.

87913067879 is a deficient number, since it is larger than the sum of its proper divisors (20329681561).

87913067879 is a wasteful number, since it uses less digits than its factorization.

87913067879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375470.

The product of its (nonzero) digits is 32006016, while the sum is 65.

The spelling of 87913067879 in words is "eighty-seven billion, nine hundred thirteen million, sixty-seven thousand, eight hundred seventy-nine".

Divisors: 1 7 13 91 2591 18137 33683 235781 372859 2610013 4847167 33930169 966077669 6762543683 12559009697 87913067879