99890579 has 2 divisors, whose sum is σ = 99890580. Its totient is φ = 99890578.

The previous prime is 99890573. The next prime is 99890627. The reversal of 99890579 is 97509899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99890579 - 2⁴ = 99890563 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (99890573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49945289 + 49945290.

It is an arithmetic number, because the mean of its divisors is an integer number (49945290).

Almost surely, 2^99890579 is an apocalyptic number.

99890579 is a deficient number, since it is larger than the sum of its proper divisors (1).

99890579 is an equidigital number, since it uses as much as digits as its factorization.

99890579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 99890579 is about 9994.5274525612. The cubic root of 99890579 is about 463.9895258114.

The spelling of 99890579 in words is "ninety-nine million, eight hundred ninety thousand, five hundred seventy-nine".