91272668 has 12 divisors (see below), whose sum is σ = 159997152. Its totient is φ = 45559200.

The previous prime is 91272667. The next prime is 91272691. The reversal of 91272668 is 86627219.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91272667) 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, 16580 + ... + 21387.

It is an arithmetic number, because the mean of its divisors is an integer number (13333096).

Almost surely, 2^91272668 is an apocalyptic number.

It is an amenable number.

91272668 is a deficient number, since it is larger than the sum of its proper divisors (68724484).

91272668 is a wasteful number, since it uses less digits than its factorization.

91272668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38572 (or 38570 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 91272668 is about 9553.6730109419. The cubic root of 91272668 is about 450.2429437143.

The spelling of 91272668 in words is "ninety-one million, two hundred seventy-two thousand, six hundred sixty-eight".