198807419 has 2 divisors, whose sum is σ = 198807420. Its totient is φ = 198807418.

The previous prime is 198807353. The next prime is 198807437. The reversal of 198807419 is 914708891.

It is a strong prime.

It is an emirp because it is prime and its reverse (914708891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198807419 is a prime.

It is a super-2 number, since 2×198807419² = 79048779698883122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198807449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99403709 + 99403710.

It is an arithmetic number, because the mean of its divisors is an integer number (99403710).

Almost surely, 2^198807419 is an apocalyptic number.

198807419 is a deficient number, since it is larger than the sum of its proper divisors (1).

198807419 is an equidigital number, since it uses as much as digits as its factorization.

198807419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 198807419 is about 14099.9084748803. The cubic root of 198807419 is about 583.6388535797.

The spelling of 198807419 in words is "one hundred ninety-eight million, eight hundred seven thousand, four hundred nineteen".