91685444 has 6 divisors (see below), whose sum is σ = 160449534. Its totient is φ = 45842720.

The previous prime is 91685423. The next prime is 91685453. The reversal of 91685444 is 44458619.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 26399044 = 8080^2 + 5138^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460677 + ... + 11460684.

It is an arithmetic number, because the mean of its divisors is an integer number (26741589).

Almost surely, 2^91685444 is an apocalyptic number.

It is an amenable number.

91685444 is a deficient number, since it is larger than the sum of its proper divisors (68764090).

91685444 is a wasteful number, since it uses less digits than its factorization.

91685444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22921365 (or 22921363 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 91685444 is about 9575.2516416019. The cubic root of 91685444 is about 450.9206567042.

It can be divided in two parts, 91685 and 444, that added together give a palindrome (92129).

The spelling of 91685444 in words is "ninety-one million, six hundred eighty-five thousand, four hundred forty-four".