90050979 has 4 divisors (see below), whose sum is σ = 120067976. Its totient is φ = 60033984.

The previous prime is 90050977. The next prime is 90050999. The reversal of 90050979 is 97905009.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90050979 - 2¹ = 90050977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90050971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15008494 + ... + 15008499.

It is an arithmetic number, because the mean of its divisors is an integer number (30016994).

Almost surely, 2^90050979 is an apocalyptic number.

90050979 is a deficient number, since it is larger than the sum of its proper divisors (30016997).

90050979 is a wasteful number, since it uses less digits than its factorization.

90050979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30016996.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 90050979 is about 9489.5194293494. The cubic root of 90050979 is about 448.2250725857.

The spelling of 90050979 in words is "ninety million, fifty thousand, nine hundred seventy-nine".