86927719631 has 4 divisors (see below), whose sum is σ = 86930764992. Its totient is φ = 86924674272.

The previous prime is 86927719583. The next prime is 86927719657. The reversal of 86927719631 is 13691772968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86927719631 - 2¹⁰ = 86927718607 is a prime.

It is a super-2 number, since 2×86927719631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86927719691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1479455 + ... + 1537088.

It is an arithmetic number, because the mean of its divisors is an integer number (21732691248).

Almost surely, 2^86927719631 is an apocalyptic number.

86927719631 is a deficient number, since it is larger than the sum of its proper divisors (3045361).

86927719631 is a wasteful number, since it uses less digits than its factorization.

86927719631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045360.

The product of its digits is 6858432, while the sum is 59.

The spelling of 86927719631 in words is "eighty-six billion, nine hundred twenty-seven million, seven hundred nineteen thousand, six hundred thirty-one".