91979008 has 72 divisors (see below), whose sum is σ = 203091840. Its totient is φ = 41226240.

The previous prime is 91978987. The next prime is 91979029. The reversal of 91979008 is 80097919.

It is an interprime number because it is at equal distance from previous prime (91978987) and next prime (91979029).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250441 + ... + 250807.

It is an arithmetic number, because the mean of its divisors is an integer number (2820720).

Almost surely, 2^91979008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91979008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101545920).

91979008 is an abundant number, since it is smaller than the sum of its proper divisors (111112832).

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

91979008 is a wasteful number, since it uses less digits than its factorization.

91979008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 91979008 is about 9590.5687005516. The cubic root of 91979008 is about 451.4014056489.

The spelling of 91979008 in words is "ninety-one million, nine hundred seventy-nine thousand, eight".