91979662 has 4 divisors (see below), whose sum is σ = 137969496. Its totient is φ = 45989830.

The previous prime is 91979653. The next prime is 91979681. The reversal of 91979662 is 26697919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26697919 = 263 ⋅101513.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22994914 + ... + 22994917.

It is an arithmetic number, because the mean of its divisors is an integer number (34492374).

Almost surely, 2^91979662 is an apocalyptic number.

91979662 is a deficient number, since it is larger than the sum of its proper divisors (45989834).

91979662 is a wasteful number, since it uses less digits than its factorization.

91979662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45989833.

The product of its digits is 367416, while the sum is 49.

The square root of 91979662 is about 9590.6027964878. The cubic root of 91979662 is about 451.4024755155.

The spelling of 91979662 in words is "ninety-one million, nine hundred seventy-nine thousand, six hundred sixty-two".