91772316 has 36 divisors (see below), whose sum is σ = 232842792. Its totient is φ = 30477024.

The previous prime is 91772311. The next prime is 91772347. The reversal of 91772316 is 61327719.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91772311) 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, 5371 + ... + 14573.

Almost surely, 2^91772316 is an apocalyptic number.

It is an amenable number.

91772316 is an abundant number, since it is smaller than the sum of its proper divisors (141070476).

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

91772316 is a wasteful number, since it uses less digits than its factorization.

91772316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490 (or 9485 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 91772316 is about 9579.7868452278. The cubic root of 91772316 is about 451.0630275908.

The spelling of 91772316 in words is "ninety-one million, seven hundred seventy-two thousand, three hundred sixteen".