91909616 has 20 divisors (see below), whose sum is σ = 188550432. Its totient is φ = 43251456.

The previous prime is 91909603. The next prime is 91909639. The reversal of 91909616 is 61690919.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168680 + ... + 169223.

Almost surely, 2^91909616 is an apocalyptic number.

It is an amenable number.

91909616 is an abundant number, since it is smaller than the sum of its proper divisors (96640816).

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

91909616 is a wasteful number, since it uses less digits than its factorization.

91909616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337928 (or 337922 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 91909616 is about 9586.9502971487. The cubic root of 91909616 is about 451.2878597159.

The spelling of 91909616 in words is "ninety-one million, nine hundred nine thousand, six hundred sixteen".