85678031 has 2 divisors, whose sum is σ = 85678032. Its totient is φ = 85678030.

The previous prime is 85678009. The next prime is 85678037. The reversal of 85678031 is 13087658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85678031 - 2²⁶ = 18569167 is a prime.

It is a super-2 number, since 2×85678031² = 14681449992073922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85678037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42839015 + 42839016.

It is an arithmetic number, because the mean of its divisors is an integer number (42839016).

Almost surely, 2^85678031 is an apocalyptic number.

85678031 is a deficient number, since it is larger than the sum of its proper divisors (1).

85678031 is an equidigital number, since it uses as much as digits as its factorization.

85678031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 85678031 is about 9256.2428122862. The cubic root of 85678031 is about 440.8489652354.

It can be divided in two parts, 856 and 78031, that added together give a palindrome (78887).

The spelling of 85678031 in words is "eighty-five million, six hundred seventy-eight thousand, thirty-one".