87871864931 has 8 divisors (see below), whose sum is σ = 88056551520. Its totient is φ = 87687275968.

The previous prime is 87871864907. The next prime is 87871864999. The reversal of 87871864931 is 13946817878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87871864931 is a prime.

It is a super-2 number, since 2×87871864931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87871864831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942175 + ... + 1986903.

It is an arithmetic number, because the mean of its divisors is an integer number (11007068940).

Almost surely, 2^87871864931 is an apocalyptic number.

87871864931 is a deficient number, since it is larger than the sum of its proper divisors (184686589).

87871864931 is a wasteful number, since it uses less digits than its factorization.

87871864931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48813.

The product of its digits is 16257024, while the sum is 62.

The spelling of 87871864931 in words is "eighty-seven billion, eight hundred seventy-one million, eight hundred sixty-four thousand, nine hundred thirty-one".