198676879 has 2 divisors, whose sum is σ = 198676880. Its totient is φ = 198676878.

The previous prime is 198676859. The next prime is 198676903. The reversal of 198676879 is 978676891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198676879 - 2⁵ = 198676847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198676859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99338439 + 99338440.

It is an arithmetic number, because the mean of its divisors is an integer number (99338440).

Almost surely, 2^198676879 is an apocalyptic number.

198676879 is a deficient number, since it is larger than the sum of its proper divisors (1).

198676879 is an equidigital number, since it uses as much as digits as its factorization.

198676879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 61.

The square root of 198676879 is about 14095.2786066825. The cubic root of 198676879 is about 583.5110835366.

The spelling of 198676879 in words is "one hundred ninety-eight million, six hundred seventy-six thousand, eight hundred seventy-nine".