198975613 has 2 divisors, whose sum is σ = 198975614. Its totient is φ = 198975612.

The previous prime is 198975571. The next prime is 198975617. The reversal of 198975613 is 316579891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133333209 + 65642404 = 11547^2 + 8102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198975613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198975617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99487806 + 99487807.

It is an arithmetic number, because the mean of its divisors is an integer number (99487807).

Almost surely, 2^198975613 is an apocalyptic number.

It is an amenable number.

198975613 is a deficient number, since it is larger than the sum of its proper divisors (1).

198975613 is an equidigital number, since it uses as much as digits as its factorization.

198975613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 49.

The square root of 198975613 is about 14105.8715788852. The cubic root of 198975613 is about 583.8033962042.

The spelling of 198975613 in words is "one hundred ninety-eight million, nine hundred seventy-five thousand, six hundred thirteen".