199622879 has 2 divisors, whose sum is σ = 199622880. Its totient is φ = 199622878.

The previous prime is 199622867. The next prime is 199622887. The reversal of 199622879 is 978226991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199622879 - 2²⁰ = 198574303 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199622879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199622179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99811439 + 99811440.

It is an arithmetic number, because the mean of its divisors is an integer number (99811440).

Almost surely, 2^199622879 is an apocalyptic number.

199622879 is a deficient number, since it is larger than the sum of its proper divisors (1).

199622879 is an equidigital number, since it uses as much as digits as its factorization.

199622879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 199622879 is about 14128.7960916704. The cubic root of 199622879 is about 584.4357468721.

The spelling of 199622879 in words is "one hundred ninety-nine million, six hundred twenty-two thousand, eight hundred seventy-nine".