90618879 has 8 divisors (see below), whose sum is σ = 130119472. Its totient is φ = 55765440.

The previous prime is 90618851. The next prime is 90618889. The reversal of 90618879 is 97881609.

It is a happy number.

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

It is not a de Polignac number, because 90618879 - 2¹¹ = 90616831 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90618839) 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, 1161742 + ... + 1161819.

It is an arithmetic number, because the mean of its divisors is an integer number (16264934).

Almost surely, 2^90618879 is an apocalyptic number.

90618879 is a deficient number, since it is larger than the sum of its proper divisors (39500593).

90618879 is a wasteful number, since it uses less digits than its factorization.

90618879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323577.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 90618879 is about 9519.3948862310. The cubic root of 90618879 is about 449.1653318118.

The spelling of 90618879 in words is "ninety million, six hundred eighteen thousand, eight hundred seventy-nine".