91772942 has 8 divisors (see below), whose sum is σ = 138429000. Its totient is φ = 45629944.

The previous prime is 91772939. The next prime is 91772969. The reversal of 91772942 is 24927719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 91772942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127817 + ... + 128532.

It is an arithmetic number, because the mean of its divisors is an integer number (17303625).

Almost surely, 2^91772942 is an apocalyptic number.

91772942 is a deficient number, since it is larger than the sum of its proper divisors (46656058).

91772942 is a wasteful number, since it uses less digits than its factorization.

91772942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256530.

The product of its digits is 63504, while the sum is 41.

The square root of 91772942 is about 9579.8195181329. The cubic root of 91772942 is about 451.0640531899.

The spelling of 91772942 in words is "ninety-one million, seven hundred seventy-two thousand, nine hundred forty-two".