86927931 has 8 divisors (see below), whose sum is σ = 128782160. Its totient is φ = 57951936.

The previous prime is 86927923. The next prime is 86927947. The reversal of 86927931 is 13972968.

It is not a de Polignac number, because 86927931 - 2³ = 86927923 is a prime.

It is a super-2 number, since 2×86927931² = 15112930375881522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86927231) 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, 1609750 + ... + 1609803.

It is an arithmetic number, because the mean of its divisors is an integer number (16097770).

Almost surely, 2^86927931 is an apocalyptic number.

86927931 is a deficient number, since it is larger than the sum of its proper divisors (41854229).

86927931 is a wasteful number, since it uses less digits than its factorization.

86927931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219562 (or 3219556 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 86927931 is about 9323.5149487733. The cubic root of 86927931 is about 442.9823754298.

The spelling of 86927931 in words is "eighty-six million, nine hundred twenty-seven thousand, nine hundred thirty-one".