91634081 has 16 divisors (see below), whose sum is σ = 114462720. Its totient is φ = 71267280.

The previous prime is 91634077. The next prime is 91634087. The reversal of 91634081 is 18043619.

It is a happy number.

It is not a de Polignac number, because 91634081 - 2² = 91634077 is a prime.

It is a super-2 number, since 2×91634081² = 16793609601429122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91634087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62960 + ... + 64398.

It is an arithmetic number, because the mean of its divisors is an integer number (7153920).

Almost surely, 2^91634081 is an apocalyptic number.

It is an amenable number.

91634081 is a deficient number, since it is larger than the sum of its proper divisors (22828639).

91634081 is a wasteful number, since it uses less digits than its factorization.

91634081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 91634081 is about 9572.5691953623. The cubic root of 91634081 is about 450.8364377233.

The spelling of 91634081 in words is "ninety-one million, six hundred thirty-four thousand, eighty-one".