198430213 has 2 divisors, whose sum is σ = 198430214. Its totient is φ = 198430212.

The previous prime is 198430207. The next prime is 198430229. The reversal of 198430213 is 312034891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173659684 + 24770529 = 13178^2 + 4977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198430213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198430313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99215106 + 99215107.

It is an arithmetic number, because the mean of its divisors is an integer number (99215107).

Almost surely, 2^198430213 is an apocalyptic number.

It is an amenable number.

198430213 is a deficient number, since it is larger than the sum of its proper divisors (1).

198430213 is an equidigital number, since it uses as much as digits as its factorization.

198430213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 198430213 is about 14086.5259379309. The cubic root of 198430213 is about 583.2694987200.

The spelling of 198430213 in words is "one hundred ninety-eight million, four hundred thirty thousand, two hundred thirteen".