91992312 has 48 divisors (see below), whose sum is σ = 253857240. Its totient is φ = 30084288.

The previous prime is 91992311. The next prime is 91992317. The reversal of 91992312 is 21329919.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91992311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8238 + ... + 15869.

Almost surely, 2^91992312 is an apocalyptic number.

It is an amenable number.

91992312 is an abundant number, since it is smaller than the sum of its proper divisors (161864928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91992312 is a wasteful number, since it uses less digits than its factorization.

91992312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24172 (or 24165 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 91992312 is about 9591.2622735488. The cubic root of 91992312 is about 451.4231684218.

It can be divided in two parts, 9199 and 2312, that added together give a palindrome (11511).

The spelling of 91992312 in words is "ninety-one million, nine hundred ninety-two thousand, three hundred twelve".