91479572 has 24 divisors (see below), whose sum is σ = 166562760. Its totient is φ = 43908480.

The previous prime is 91479517. The next prime is 91479587. The reversal of 91479572 is 27597419.

It can be written as a sum of positive squares in 4 ways, for example, as 16760836 + 74718736 = 4094^2 + 8644^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 18818 + ... + 23174.

It is an arithmetic number, because the mean of its divisors is an integer number (6940115).

Almost surely, 2^91479572 is an apocalyptic number.

It is an amenable number.

91479572 is a deficient number, since it is larger than the sum of its proper divisors (75083188).

91479572 is a wasteful number, since it uses less digits than its factorization.

91479572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571 (or 4569 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The square root of 91479572 is about 9564.4953865847. The cubic root of 91479572 is about 450.5829022316.

The spelling of 91479572 in words is "ninety-one million, four hundred seventy-nine thousand, five hundred seventy-two".