99988579 has 2 divisors, whose sum is σ = 99988580. Its totient is φ = 99988578.

The previous prime is 99988573. The next prime is 99988591. The reversal of 99988579 is 97588999.

It is a weak prime.

It is an emirp because it is prime and its reverse (97588999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99988579 - 2³ = 99988571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99988579.

It is not a weakly prime, because it can be changed into another prime (99988571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994289 + 49994290.

It is an arithmetic number, because the mean of its divisors is an integer number (49994290).

Almost surely, 2^99988579 is an apocalyptic number.

99988579 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988579 is an equidigital number, since it uses as much as digits as its factorization.

99988579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 64.

The square root of 99988579 is about 9999.4289336942. The cubic root of 99988579 is about 464.1412121598.

The spelling of 99988579 in words is "ninety-nine million, nine hundred eighty-eight thousand, five hundred seventy-nine".