91690901 has 8 divisors (see below), whose sum is σ = 96436224. Its totient is φ = 87057360.

The previous prime is 91690889. The next prime is 91690919. The reversal of 91690901 is 10909619.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91690901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91690981) 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, 26261 + ... + 29546.

It is an arithmetic number, because the mean of its divisors is an integer number (12054528).

Almost surely, 2^91690901 is an apocalyptic number.

It is an amenable number.

91690901 is a deficient number, since it is larger than the sum of its proper divisors (4745323).

91690901 is a wasteful number, since it uses less digits than its factorization.

91690901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55891.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 91690901 is about 9575.5365907086. The cubic root of 91690901 is about 450.9296025997.

The spelling of 91690901 in words is "ninety-one million, six hundred ninety thousand, nine hundred one".