90459879 has 4 divisors (see below), whose sum is σ = 120613176. Its totient is φ = 60306584.

The previous prime is 90459869. The next prime is 90459911. The reversal of 90459879 is 97895409.

It is a happy number.

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 90459879 - 2⁵ = 90459847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90459869) 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, 15076644 + ... + 15076649.

It is an arithmetic number, because the mean of its divisors is an integer number (30153294).

Almost surely, 2^90459879 is an apocalyptic number.

90459879 is a deficient number, since it is larger than the sum of its proper divisors (30153297).

90459879 is a wasteful number, since it uses less digits than its factorization.

90459879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30153296.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 90459879 is about 9511.0398485129. The cubic root of 90459879 is about 448.9024759958.

The spelling of 90459879 in words is "ninety million, four hundred fifty-nine thousand, eight hundred seventy-nine".