198443519 has 2 divisors, whose sum is σ = 198443520. Its totient is φ = 198443518.

The previous prime is 198443507. The next prime is 198443521. The reversal of 198443519 is 915344891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198443519 - 2⁴ = 198443503 is a prime.

It is a super-2 number, since 2×198443519² = 78759660466206722, which contains 22 as substring.

Together with 198443521, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198443519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198443579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99221759 + 99221760.

It is an arithmetic number, because the mean of its divisors is an integer number (99221760).

Almost surely, 2^198443519 is an apocalyptic number.

198443519 is a deficient number, since it is larger than the sum of its proper divisors (1).

198443519 is an equidigital number, since it uses as much as digits as its factorization.

198443519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The square root of 198443519 is about 14086.9982253140. The cubic root of 198443519 is about 583.2825357308.

The spelling of 198443519 in words is "one hundred ninety-eight million, four hundred forty-three thousand, five hundred nineteen".