90790979 has 4 divisors (see below), whose sum is σ = 91221480. Its totient is φ = 90360480.

The previous prime is 90790969. The next prime is 90790993. The reversal of 90790979 is 97909709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97909709 = 53 ⋅1847353.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90790979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90790969) 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, 214934 + ... + 215355.

It is an arithmetic number, because the mean of its divisors is an integer number (22805370).

Almost surely, 2^90790979 is an apocalyptic number.

90790979 is a deficient number, since it is larger than the sum of its proper divisors (430501).

90790979 is a wasteful number, since it uses less digits than its factorization.

90790979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430500.

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 90790979 is about 9528.4300385740. The cubic root of 90790979 is about 449.4494980182.

The spelling of 90790979 in words is "ninety million, seven hundred ninety thousand, nine hundred seventy-nine".