91675631 has 16 divisors (see below), whose sum is σ = 99525888. Its totient is φ = 84216000.

The previous prime is 91675609. The next prime is 91675667. The reversal of 91675631 is 13657619.

It is a cyclic number.

It is not a de Polignac number, because 91675631 - 2¹⁰ = 91674607 is a prime.

It is a super-2 number, since 2×91675631² = 16808842638496322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91675691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62456 + ... + 63906.

It is an arithmetic number, because the mean of its divisors is an integer number (6220368).

Almost surely, 2^91675631 is an apocalyptic number.

91675631 is a deficient number, since it is larger than the sum of its proper divisors (7850257).

91675631 is a wasteful number, since it uses less digits than its factorization.

91675631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582.

The product of its digits is 34020, while the sum is 38.

The square root of 91675631 is about 9574.7392131588. The cubic root of 91675631 is about 450.9045689369.

The spelling of 91675631 in words is "ninety-one million, six hundred seventy-five thousand, six hundred thirty-one".