91497272 has 8 divisors (see below), whose sum is σ = 171557400. Its totient is φ = 45748632.

The previous prime is 91497257. The next prime is 91497283. The reversal of 91497272 is 27279419.

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

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, 5718572 + ... + 5718587.

It is an arithmetic number, because the mean of its divisors is an integer number (21444675).

Almost surely, 2^91497272 is an apocalyptic number.

It is an amenable number.

91497272 is a deficient number, since it is larger than the sum of its proper divisors (80060128).

91497272 is a wasteful number, since it uses less digits than its factorization.

91497272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11437165 (or 11437161 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 91497272 is about 9565.4206389474. The cubic root of 91497272 is about 450.6119608249.

The spelling of 91497272 in words is "ninety-one million, four hundred ninety-seven thousand, two hundred seventy-two".