85631039 has 16 divisors (see below), whose sum is σ = 94711680. Its totient is φ = 76926720.

The previous prime is 85631033. The next prime is 85631053. The reversal of 85631039 is 93013658.

It is a de Polignac number, because none of the positive numbers 2^k-85631039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85631033) 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 in 15 ways as a sum of consecutive naturals, for example, 164099 + ... + 164619.

It is an arithmetic number, because the mean of its divisors is an integer number (5919480).

Almost surely, 2^85631039 is an apocalyptic number.

85631039 is a deficient number, since it is larger than the sum of its proper divisors (9080641).

85631039 is a wasteful number, since it uses less digits than its factorization.

85631039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 85631039 is about 9253.7040691822. The cubic root of 85631039 is about 440.7683527262.

The spelling of 85631039 in words is "eighty-five million, six hundred thirty-one thousand, thirty-nine".