90659879 has 8 divisors (see below), whose sum is σ = 94018080. Its totient is φ = 87349536.

The previous prime is 90659801. The next prime is 90659893. The reversal of 90659879 is 97895609.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90659879 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 90659879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90659479) 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, 8084 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (11752260).

Almost surely, 2^90659879 is an apocalyptic number.

90659879 is a deficient number, since it is larger than the sum of its proper divisors (3358201).

90659879 is a wasteful number, since it uses less digits than its factorization.

90659879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23929.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 90659879 is about 9521.5481409275. The cubic root of 90659879 is about 449.2330623706.

The spelling of 90659879 in words is "ninety million, six hundred fifty-nine thousand, eight hundred seventy-nine".