198433379 has 2 divisors, whose sum is σ = 198433380. Its totient is φ = 198433378.

The previous prime is 198433337. The next prime is 198433381. The reversal of 198433379 is 973334891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198433379 is a prime.

Together with 198433381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198439379) 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, 99216689 + 99216690.

It is an arithmetic number, because the mean of its divisors is an integer number (99216690).

Almost surely, 2^198433379 is an apocalyptic number.

198433379 is a deficient number, since it is larger than the sum of its proper divisors (1).

198433379 is an equidigital number, since it uses as much as digits as its factorization.

198433379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 198433379 is about 14086.6383143744. The cubic root of 198433379 is about 583.2726007701.

The spelling of 198433379 in words is "one hundred ninety-eight million, four hundred thirty-three thousand, three hundred seventy-nine".