85631079 has 4 divisors (see below), whose sum is σ = 114174776. Its totient is φ = 57087384.

The previous prime is 85631059. The next prime is 85631107. The reversal of 85631079 is 97013658.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85631079 - 2¹¹ = 85629031 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 (85631059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14271844 + ... + 14271849.

It is an arithmetic number, because the mean of its divisors is an integer number (28543694).

Almost surely, 2^85631079 is an apocalyptic number.

85631079 is a deficient number, since it is larger than the sum of its proper divisors (28543697).

85631079 is a wasteful number, since it uses less digits than its factorization.

85631079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28543696.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 85631079 is about 9253.7062304787. The cubic root of 85631079 is about 440.7684213568.

The spelling of 85631079 in words is "eighty-five million, six hundred thirty-one thousand, seventy-nine".