86869931 has 2 divisors, whose sum is σ = 86869932. Its totient is φ = 86869930.

The previous prime is 86869921. The next prime is 86869961. The reversal of 86869931 is 13996868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86869931 - 2²⁶ = 19761067 is a prime.

It is a super-2 number, since 2×86869931² = 15092769823889522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86869931.

It is not a weakly prime, because it can be changed into another prime (86869921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43434965 + 43434966.

It is an arithmetic number, because the mean of its divisors is an integer number (43434966).

Almost surely, 2^86869931 is an apocalyptic number.

86869931 is a deficient number, since it is larger than the sum of its proper divisors (1).

86869931 is an equidigital number, since it uses as much as digits as its factorization.

86869931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 86869931 is about 9320.4040148483. The cubic root of 86869931 is about 442.8838313682.

The spelling of 86869931 in words is "eighty-six million, eight hundred sixty-nine thousand, nine hundred thirty-one".