91975895 has 16 divisors (see below), whose sum is σ = 123661728. Its totient is φ = 65082240.

The previous prime is 91975889. The next prime is 91975901. The reversal of 91975895 is 59857919.

It is an interprime number because it is at equal distance from previous prime (91975889) and next prime (91975901).

It is not a de Polignac number, because 91975895 - 2⁴ = 91975879 is a prime.

It is a super-2 number, since 2×91975895² = 16919130522102050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20564 + ... + 24633.

It is an arithmetic number, because the mean of its divisors is an integer number (7728858).

Almost surely, 2^91975895 is an apocalyptic number.

91975895 is a deficient number, since it is larger than the sum of its proper divisors (31685833).

91975895 is a wasteful number, since it uses less digits than its factorization.

91975895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45250.

The product of its digits is 1020600, while the sum is 53.

The square root of 91975895 is about 9590.4064043188. The cubic root of 91975895 is about 451.3963130796.

The spelling of 91975895 in words is "ninety-one million, nine hundred seventy-five thousand, eight hundred ninety-five".