91275081 has 8 divisors (see below), whose sum is σ = 124289664. Its totient is φ = 59555280.

The previous prime is 91275077. The next prime is 91275097. The reversal of 91275081 is 18057219.

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

It is not a de Polignac number, because 91275081 - 2² = 91275077 is a prime.

It is a super-2 number, since 2×91275081² = 16662280823113122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91275011) 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, 323530 + ... + 323811.

It is an arithmetic number, because the mean of its divisors is an integer number (15536208).

Almost surely, 2^91275081 is an apocalyptic number.

It is an amenable number.

91275081 is a deficient number, since it is larger than the sum of its proper divisors (33014583).

91275081 is a wasteful number, since it uses less digits than its factorization.

91275081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647391.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 91275081 is about 9553.7992966149. The cubic root of 91275081 is about 450.2469114105.

The spelling of 91275081 in words is "ninety-one million, two hundred seventy-five thousand, eighty-one".