91275956 has 6 divisors (see below), whose sum is σ = 159732930. Its totient is φ = 45637976.

The previous prime is 91275949. The next prime is 91275973. The reversal of 91275956 is 65957219.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48163600 + 43112356 = 6940^2 + 6566^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11409491 + ... + 11409498.

It is an arithmetic number, because the mean of its divisors is an integer number (26622155).

Almost surely, 2^91275956 is an apocalyptic number.

It is an amenable number.

91275956 is a deficient number, since it is larger than the sum of its proper divisors (68456974).

91275956 is a wasteful number, since it uses less digits than its factorization.

91275956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22818993 (or 22818991 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 91275956 is about 9553.8450898055. The cubic root of 91275956 is about 450.2483501558.

The spelling of 91275956 in words is "ninety-one million, two hundred seventy-five thousand, nine hundred fifty-six".