99618979 has 2 divisors, whose sum is σ = 99618980. Its totient is φ = 99618978.

The previous prime is 99618949. The next prime is 99618989. The reversal of 99618979 is 97981699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99618979 - 2⁵ = 99618947 is a prime.

It is not a weakly prime, because it can be changed into another prime (99618949) 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 as a sum of consecutive naturals, namely, 49809489 + 49809490.

It is an arithmetic number, because the mean of its divisors is an integer number (49809490).

Almost surely, 2^99618979 is an apocalyptic number.

99618979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99618979 is an equidigital number, since it uses as much as digits as its factorization.

99618979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 58.

The square root of 99618979 is about 9980.9307682200. The cubic root of 99618979 is about 463.5686187750.

The spelling of 99618979 in words is "ninety-nine million, six hundred eighteen thousand, nine hundred seventy-nine".