85558931 has 2 divisors, whose sum is σ = 85558932. Its totient is φ = 85558930.

The previous prime is 85558927. The next prime is 85558969. The reversal of 85558931 is 13985558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85558931 - 2² = 85558927 is a prime.

It is a super-2 number, since 2×85558931² = 14640661347725522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85558901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42779465 + 42779466.

It is an arithmetic number, because the mean of its divisors is an integer number (42779466).

Almost surely, 2^85558931 is an apocalyptic number.

85558931 is a deficient number, since it is larger than the sum of its proper divisors (1).

85558931 is an equidigital number, since it uses as much as digits as its factorization.

85558931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 44.

The square root of 85558931 is about 9249.8070790693. The cubic root of 85558931 is about 440.6445975624.

The spelling of 85558931 in words is "eighty-five million, five hundred fifty-eight thousand, nine hundred thirty-one".