91992812 has 6 divisors (see below), whose sum is σ = 160987428. Its totient is φ = 45996404.

The previous prime is 91992811. The next prime is 91992821. The reversal of 91992812 is 21829919.

It is a self number, because there is not a number n which added to its sum of digits gives 91992812.

It is not an unprimeable number, because it can be changed into a prime (91992811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11499098 + ... + 11499105.

It is an arithmetic number, because the mean of its divisors is an integer number (26831238).

Almost surely, 2^91992812 is an apocalyptic number.

It is an amenable number.

91992812 is a deficient number, since it is larger than the sum of its proper divisors (68994616).

91992812 is a wasteful number, since it uses less digits than its factorization.

91992812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22998207 (or 22998205 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The square root of 91992812 is about 9591.2883389042. The cubic root of 91992812 is about 451.4239862842.

The spelling of 91992812 in words is "ninety-one million, nine hundred ninety-two thousand, eight hundred twelve".