91065472 has 32 divisors (see below), whose sum is σ = 182079180. Its totient is φ = 45367296.

The previous prime is 91065463. The next prime is 91065503. The reversal of 91065472 is 27456019.

It can be written as a sum of positive squares in 2 ways, for example, as 89567296 + 1498176 = 9464^2 + 1224^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 in 3 ways as a sum of consecutive naturals, for example, 38928 + ... + 41200.

Almost surely, 2^91065472 is an apocalyptic number.

It is an amenable number.

91065472 is a deficient number, since it is larger than the sum of its proper divisors (91013708).

91065472 is a wasteful number, since it uses less digits than its factorization.

91065472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 91065472 is about 9542.8230623857. The cubic root of 91065472 is about 449.9019901777.

The spelling of 91065472 in words is "ninety-one million, sixty-five thousand, four hundred seventy-two".