198881323 has 2 divisors, whose sum is σ = 198881324. Its totient is φ = 198881322.

The previous prime is 198881297. The next prime is 198881359. The reversal of 198881323 is 323188891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198881323 - 2²⁵ = 165326891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198881323.

It is not a weakly prime, because it can be changed into another prime (198881383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99440661 + 99440662.

It is an arithmetic number, because the mean of its divisors is an integer number (99440662).

Almost surely, 2^198881323 is an apocalyptic number.

198881323 is a deficient number, since it is larger than the sum of its proper divisors (1).

198881323 is an equidigital number, since it uses as much as digits as its factorization.

198881323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 198881323 is about 14102.5289576019. The cubic root of 198881323 is about 583.7111646005.

The spelling of 198881323 in words is "one hundred ninety-eight million, eight hundred eighty-one thousand, three hundred twenty-three".