91096057 has 4 divisors (see below), whose sum is σ = 98103460. Its totient is φ = 84088656.

The previous prime is 91096021. The next prime is 91096063. The reversal of 91096057 is 75069019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75069019 = 19 ⋅3951001.

It can be written as a sum of positive squares in 2 ways, for example, as 57699216 + 33396841 = 7596^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 91096057 - 2⁷ = 91095929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91096097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503682 + ... + 3503707.

It is an arithmetic number, because the mean of its divisors is an integer number (24525865).

Almost surely, 2^91096057 is an apocalyptic number.

It is an amenable number.

91096057 is a deficient number, since it is larger than the sum of its proper divisors (7007403).

91096057 is a wasteful number, since it uses less digits than its factorization.

91096057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007402.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 91096057 is about 9544.4254410624. The cubic root of 91096057 is about 449.9523521567.

The spelling of 91096057 in words is "ninety-one million, ninety-six thousand, fifty-seven".