86259931 has 2 divisors, whose sum is σ = 86259932. Its totient is φ = 86259930.

The previous prime is 86259923. The next prime is 86259967. The reversal of 86259931 is 13995268.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86259931 - 2³ = 86259923 is a prime.

It is a super-2 number, since 2×86259931² = 14881551392249522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86259431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43129965 + 43129966.

It is an arithmetic number, because the mean of its divisors is an integer number (43129966).

Almost surely, 2^86259931 is an apocalyptic number.

86259931 is a deficient number, since it is larger than the sum of its proper divisors (1).

86259931 is an equidigital number, since it uses as much as digits as its factorization.

86259931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 86259931 is about 9287.6224621805. The cubic root of 86259931 is about 441.8447531190.

The spelling of 86259931 in words is "eighty-six million, two hundred fifty-nine thousand, nine hundred thirty-one".