85913631 has 48 divisors (see below), whose sum is σ = 138434400. Its totient is φ = 51270912.

The previous prime is 85913591. The next prime is 85913647. The reversal of 85913631 is 13631958.

It is a happy number.

85913631 is a `hidden beast` number, since 8 + 5 + 9 + 13 + 631 = 666.

It is not a de Polignac number, because 85913631 - 2¹⁷ = 85782559 is a prime.

It is a super-2 number, since 2×85913631² = 14762303983208322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85915631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1282260 + ... + 1282326.

It is an arithmetic number, because the mean of its divisors is an integer number (2884050).

Almost surely, 2^85913631 is an apocalyptic number.

85913631 is a deficient number, since it is larger than the sum of its proper divisors (52520769).

85913631 is a wasteful number, since it uses less digits than its factorization.

85913631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 116 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 85913631 is about 9268.9606213426. The cubic root of 85913631 is about 441.2526819462.

The spelling of 85913631 in words is "eighty-five million, nine hundred thirteen thousand, six hundred thirty-one".