86845931 has 2 divisors, whose sum is σ = 86845932. Its totient is φ = 86845930.

The previous prime is 86845921. The next prime is 86845951. The reversal of 86845931 is 13954868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86845931 - 2⁶ = 86845867 is a prime.

It is a super-2 number, since 2×86845931² = 15084431462513522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86845921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43422965 + 43422966.

It is an arithmetic number, because the mean of its divisors is an integer number (43422966).

Almost surely, 2^86845931 is an apocalyptic number.

86845931 is a deficient number, since it is larger than the sum of its proper divisors (1).

86845931 is an equidigital number, since it uses as much as digits as its factorization.

86845931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 86845931 is about 9319.1164280741. The cubic root of 86845931 is about 442.8430416847.

The spelling of 86845931 in words is "eighty-six million, eight hundred forty-five thousand, nine hundred thirty-one".