90517879 has 8 divisors (see below), whose sum is σ = 91497168. Its totient is φ = 89544000.

The previous prime is 90517831. The next prime is 90517897. The reversal of 90517879 is 97871509.

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 90517879 - 2¹³ = 90509687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90547879) 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, 38259 + ... + 40555.

It is an arithmetic number, because the mean of its divisors is an integer number (11437146).

Almost surely, 2^90517879 is an apocalyptic number.

90517879 is a deficient number, since it is larger than the sum of its proper divisors (979289).

90517879 is a wasteful number, since it uses less digits than its factorization.

90517879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 90517879 is about 9514.0884481909. The cubic root of 90517879 is about 448.9983961662.

The spelling of 90517879 in words is "ninety million, five hundred seventeen thousand, eight hundred seventy-nine".