90597979 has 4 divisors (see below), whose sum is σ = 90631080. Its totient is φ = 90564880.

The previous prime is 90597973. The next prime is 90598009. The reversal of 90597979 is 97979509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90597979 - 2³ = 90597971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90597971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12034 + ... + 18055.

It is an arithmetic number, because the mean of its divisors is an integer number (22657770).

Almost surely, 2^90597979 is an apocalyptic number.

90597979 is a deficient number, since it is larger than the sum of its proper divisors (33101).

90597979 is a wasteful number, since it uses less digits than its factorization.

90597979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33100.

The product of its (nonzero) digits is 1607445, while the sum is 55.

The square root of 90597979 is about 9518.2970640761. The cubic root of 90597979 is about 449.1307978849.

The spelling of 90597979 in words is "ninety million, five hundred ninety-seven thousand, nine hundred seventy-nine".