91579499 has 8 divisors (see below), whose sum is σ = 100035648. Its totient is φ = 83145160.

The previous prime is 91579471. The next prime is 91579507. The reversal of 91579499 is 99497519.

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

It is a cyclic number.

It is not a de Polignac number, because 91579499 - 2¹² = 91575403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91579499.

It is not an unprimeable number, because it can be changed into a prime (91579409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064 + ... + 14130.

It is an arithmetic number, because the mean of its divisors is an integer number (12504456).

Almost surely, 2^91579499 is an apocalyptic number.

91579499 is a deficient number, since it is larger than the sum of its proper divisors (8456149).

91579499 is a wasteful number, since it uses less digits than its factorization.

91579499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10905.

The product of its digits is 918540, while the sum is 53.

The square root of 91579499 is about 9569.7178119316. The cubic root of 91579499 is about 450.7469061079.

The spelling of 91579499 in words is "ninety-one million, five hundred seventy-nine thousand, four hundred ninety-nine".