99680579 has 4 divisors (see below), whose sum is σ = 101998776. Its totient is φ = 97362384.

The previous prime is 99680573. The next prime is 99680587. The reversal of 99680579 is 97508699.

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 99680579 - 2²⁰ = 98632003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99680579.

It is not an unprimeable number, because it can be changed into a prime (99680573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1159034 + ... + 1159119.

It is an arithmetic number, because the mean of its divisors is an integer number (25499694).

Almost surely, 2^99680579 is an apocalyptic number.

99680579 is a deficient number, since it is larger than the sum of its proper divisors (2318197).

99680579 is a wasteful number, since it uses less digits than its factorization.

99680579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318196.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 99680579 is about 9984.0161758683. The cubic root of 99680579 is about 463.6641492429.

The spelling of 99680579 in words is "ninety-nine million, six hundred eighty thousand, five hundred seventy-nine".