91775272 has 8 divisors (see below), whose sum is σ = 172078650. Its totient is φ = 45887632.

The previous prime is 91775249. The next prime is 91775297. The reversal of 91775272 is 27257719.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83283876 + 8491396 = 9126^2 + 2914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5735947 + ... + 5735962.

Almost surely, 2^91775272 is an apocalyptic number.

It is an amenable number.

91775272 is a deficient number, since it is larger than the sum of its proper divisors (80303378).

91775272 is a wasteful number, since it uses less digits than its factorization.

91775272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471915 (or 11471911 counting only the distinct ones).

The product of its digits is 61740, while the sum is 40.

The square root of 91775272 is about 9579.9411271677. The cubic root of 91775272 is about 451.0678704746.

The spelling of 91775272 in words is "ninety-one million, seven hundred seventy-five thousand, two hundred seventy-two".