91868522 has 8 divisors (see below), whose sum is σ = 138252576. Its totient is φ = 45784332.

The previous prime is 91868519. The next prime is 91868563. The reversal of 91868522 is 22586819.

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 91868522.

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, 74198 + ... + 75425.

It is an arithmetic number, because the mean of its divisors is an integer number (17281572).

Almost surely, 2^91868522 is an apocalyptic number.

91868522 is a deficient number, since it is larger than the sum of its proper divisors (46384054).

91868522 is a wasteful number, since it uses less digits than its factorization.

91868522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149932.

The product of its digits is 69120, while the sum is 41.

The square root of 91868522 is about 9584.8068316477. The cubic root of 91868522 is about 451.2205907737.

The spelling of 91868522 in words is "ninety-one million, eight hundred sixty-eight thousand, five hundred twenty-two".