91631694 has 32 divisors (see below), whose sum is σ = 228485376. Its totient is φ = 23800320.

The previous prime is 91631681. The next prime is 91631713. The reversal of 91631694 is 49613619.

It is a congruent number.

It is an unprimeable number.

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, 98707 + ... + 99630.

It is an arithmetic number, because the mean of its divisors is an integer number (7140168).

Almost surely, 2^91631694 is an apocalyptic number.

91631694 is an abundant number, since it is smaller than the sum of its proper divisors (136853682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91631694 is a wasteful number, since it uses less digits than its factorization.

91631694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198360.

The product of its digits is 34992, while the sum is 39.

The square root of 91631694 is about 9572.4445153785. Note that the first 3 decimals coincide. The cubic root of 91631694 is about 450.8325230375.

The spelling of 91631694 in words is "ninety-one million, six hundred thirty-one thousand, six hundred ninety-four".