198826379 has 2 divisors, whose sum is σ = 198826380. Its totient is φ = 198826378.

The previous prime is 198826363. The next prime is 198826427. The reversal of 198826379 is 973628891.

It is a weak prime.

It is an emirp because it is prime and its reverse (973628891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198826379 - 2⁴ = 198826363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198826379.

It is not a weakly prime, because it can be changed into another prime (198823379) 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, 99413189 + 99413190.

It is an arithmetic number, because the mean of its divisors is an integer number (99413190).

Almost surely, 2^198826379 is an apocalyptic number.

198826379 is a deficient number, since it is larger than the sum of its proper divisors (1).

198826379 is an equidigital number, since it uses as much as digits as its factorization.

198826379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 198826379 is about 14100.5808036407. The cubic root of 198826379 is about 583.6574066112.

The spelling of 198826379 in words is "one hundred ninety-eight million, eight hundred twenty-six thousand, three hundred seventy-nine".