90564179 has 4 divisors (see below), whose sum is σ = 94501776. Its totient is φ = 86626584.

The previous prime is 90564169. The next prime is 90564181. The reversal of 90564179 is 97146509.

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 90564179 - 2⁴ = 90564163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90564119) 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, 1968764 + ... + 1968809.

It is an arithmetic number, because the mean of its divisors is an integer number (23625444).

Almost surely, 2^90564179 is an apocalyptic number.

90564179 is a deficient number, since it is larger than the sum of its proper divisors (3937597).

90564179 is a wasteful number, since it uses less digits than its factorization.

90564179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937596.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90564179 is about 9516.5213707531. The cubic root of 90564179 is about 449.0749375174.

The spelling of 90564179 in words is "ninety million, five hundred sixty-four thousand, one hundred seventy-nine".