91045765 has 8 divisors (see below), whose sum is σ = 110276640. Its totient is φ = 72155472.

The previous prime is 91045741. The next prime is 91045781. The reversal of 91045765 is 56754019.

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

It is a cyclic number.

It is not a de Polignac number, because 91045765 - 2²⁵ = 57491333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84555 + ... + 85624.

It is an arithmetic number, because the mean of its divisors is an integer number (13784580).

Almost surely, 2^91045765 is an apocalyptic number.

It is an amenable number.

91045765 is a deficient number, since it is larger than the sum of its proper divisors (19230875).

91045765 is a wasteful number, since it uses less digits than its factorization.

91045765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170291.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 91045765 is about 9541.7904504343. The cubic root of 91045765 is about 449.8695341949.

The spelling of 91045765 in words is "ninety-one million, forty-five thousand, seven hundred sixty-five".