91423686 has 32 divisors (see below), whose sum is σ = 190512000. Its totient is φ = 29222720.

The previous prime is 91423663. The next prime is 91423699. The reversal of 91423686 is 68632419.

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, 11365 + ... + 17663.

It is an arithmetic number, because the mean of its divisors is an integer number (5953500).

Almost surely, 2^91423686 is an apocalyptic number.

91423686 is an abundant number, since it is smaller than the sum of its proper divisors (99088314).

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

91423686 is a wasteful number, since it uses less digits than its factorization.

91423686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404.

The product of its digits is 62208, while the sum is 39.

The square root of 91423686 is about 9561.5734060875. The cubic root of 91423686 is about 450.4911279876.

The spelling of 91423686 in words is "ninety-one million, four hundred twenty-three thousand, six hundred eighty-six".