108199979 has 2 divisors, whose sum is σ = 108199980. Its totient is φ = 108199978.

The previous prime is 108199939. The next prime is 108200009. The reversal of 108199979 is 979991801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 108199979 - 2²⁰ = 107151403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 108199979.

It is not a weakly prime, because it can be changed into another prime (108199939) 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, 54099989 + 54099990.

It is an arithmetic number, because the mean of its divisors is an integer number (54099990).

Almost surely, 2^108199979 is an apocalyptic number.

108199979 is a deficient number, since it is larger than the sum of its proper divisors (1).

108199979 is an equidigital number, since it uses as much as digits as its factorization.

108199979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 53.

The square root of 108199979 is about 10401.9218897279. The cubic root of 108199979 is about 476.5140666479.

The spelling of 108199979 in words is "one hundred eight million, one hundred ninety-nine thousand, nine hundred seventy-nine".