91685949 has 8 divisors (see below), whose sum is σ = 124072800. Its totient is φ = 60211536.

The previous prime is 91685927. The next prime is 91685977. The reversal of 91685949 is 94958619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91685949 - 2⁵ = 91685917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91685249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227874 + ... + 228275.

It is an arithmetic number, because the mean of its divisors is an integer number (15509100).

Almost surely, 2^91685949 is an apocalyptic number.

It is an amenable number.

91685949 is a deficient number, since it is larger than the sum of its proper divisors (32386851).

91685949 is a wasteful number, since it uses less digits than its factorization.

91685949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456219.

The product of its digits is 699840, while the sum is 51.

The square root of 91685949 is about 9575.2780116297. The cubic root of 91685949 is about 450.9214845874.

The spelling of 91685949 in words is "ninety-one million, six hundred eighty-five thousand, nine hundred forty-nine".