90518979 has 8 divisors (see below), whose sum is σ = 120832192. Its totient is φ = 60275880.

The previous prime is 90518969. The next prime is 90519001. The reversal of 90518979 is 97981509.

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

It is not a de Polignac number, because 90518979 - 2¹³ = 90510787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90518929) 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, 14437 + ... + 19734.

It is an arithmetic number, because the mean of its divisors is an integer number (15104024).

Almost surely, 2^90518979 is an apocalyptic number.

90518979 is a deficient number, since it is larger than the sum of its proper divisors (30313213).

90518979 is a wasteful number, since it uses less digits than its factorization.

90518979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35057.

The product of its (nonzero) digits is 204120, while the sum is 48.

The square root of 90518979 is about 9514.1462570217. The cubic root of 90518979 is about 449.0002149459. Note that the first 3 decimals are identical.

The spelling of 90518979 in words is "ninety million, five hundred eighteen thousand, nine hundred seventy-nine".