91690704 has 140 divisors (see below), whose sum is σ = 304675936. Its totient is φ = 26174016.

The previous prime is 91690679. The next prime is 91690717. The reversal of 91690704 is 40709619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 81087 + ... + 82209.

Almost surely, 2^91690704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91690704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152337968).

91690704 is an abundant number, since it is smaller than the sum of its proper divisors (212985232).

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

91690704 is a wasteful number, since it uses less digits than its factorization.

91690704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 91690704 is about 9575.5263040733. The cubic root of 91690704 is about 450.9292796553.

The spelling of 91690704 in words is "ninety-one million, six hundred ninety thousand, seven hundred four".