198190259 has 2 divisors, whose sum is σ = 198190260. Its totient is φ = 198190258.

The previous prime is 198190253. The next prime is 198190271. The reversal of 198190259 is 952091891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198190259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198190253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99095129 + 99095130.

It is an arithmetic number, because the mean of its divisors is an integer number (99095130).

Almost surely, 2^198190259 is an apocalyptic number.

198190259 is a deficient number, since it is larger than the sum of its proper divisors (1).

198190259 is an equidigital number, since it uses as much as digits as its factorization.

198190259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 198190259 is about 14078.0062153701. The cubic root of 198190259 is about 583.0342954541.

The spelling of 198190259 in words is "one hundred ninety-eight million, one hundred ninety thousand, two hundred fifty-nine".