90321579 has 6 divisors (see below), whose sum is σ = 130464516. Its totient is φ = 60214380.

The previous prime is 90321571. The next prime is 90321587. The reversal of 90321579 is 97512309.

It is an interprime number because it is at equal distance from previous prime (90321571) and next prime (90321587).

It is not a de Polignac number, because 90321579 - 2³ = 90321571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90321571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5017857 + ... + 5017874.

It is an arithmetic number, because the mean of its divisors is an integer number (21744086).

Almost surely, 2^90321579 is an apocalyptic number.

90321579 is a deficient number, since it is larger than the sum of its proper divisors (40142937).

90321579 is a wasteful number, since it uses less digits than its factorization.

90321579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10035737 (or 10035734 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 90321579 is about 9503.7665691030. The cubic root of 90321579 is about 448.6735904436.

The spelling of 90321579 in words is "ninety million, three hundred twenty-one thousand, five hundred seventy-nine".