91775059 has 8 divisors (see below), whose sum is σ = 95664848. Its totient is φ = 87959520.

The previous prime is 91775039. The next prime is 91775071. The reversal of 91775059 is 95057719.

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 91775059 - 2⁹ = 91774547 is a prime.

It is a super-2 number, since 2×91775059² = 16845322908906962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91775039) 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, 16032 + ... + 20989.

It is an arithmetic number, because the mean of its divisors is an integer number (11958106).

Almost surely, 2^91775059 is an apocalyptic number.

91775059 is a deficient number, since it is larger than the sum of its proper divisors (3889789).

91775059 is a wasteful number, since it uses less digits than its factorization.

91775059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37125.

The product of its (nonzero) digits is 99225, while the sum is 43.

The square root of 91775059 is about 9579.9300101827. The cubic root of 91775059 is about 451.0675215152.

The spelling of 91775059 in words is "ninety-one million, seven hundred seventy-five thousand, fifty-nine".