198441613 has 2 divisors, whose sum is σ = 198441614. Its totient is φ = 198441612.

The previous prime is 198441611. The next prime is 198441701. The reversal of 198441613 is 316144891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169572484 + 28869129 = 13022^2 + 5373^2 .

It is a cyclic number.

It is not a de Polignac number, because 198441613 - 2¹ = 198441611 is a prime.

Together with 198441611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198441611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99220806 + 99220807.

It is an arithmetic number, because the mean of its divisors is an integer number (99220807).

Almost surely, 2^198441613 is an apocalyptic number.

It is an amenable number.

198441613 is a deficient number, since it is larger than the sum of its proper divisors (1).

198441613 is an equidigital number, since it uses as much as digits as its factorization.

198441613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 198441613 is about 14086.9305741173. The cubic root of 198441613 is about 583.2806682975.

The spelling of 198441613 in words is "one hundred ninety-eight million, four hundred forty-one thousand, six hundred thirteen".