198185419 has 2 divisors, whose sum is σ = 198185420. Its totient is φ = 198185418.

The previous prime is 198185381. The next prime is 198185441. The reversal of 198185419 is 914581891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198185419 - 2²⁷ = 63967691 is a prime.

It is a super-2 number, since 2×198185419² = 78554920608411122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198185459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99092709 + 99092710.

It is an arithmetic number, because the mean of its divisors is an integer number (99092710).

Almost surely, 2^198185419 is an apocalyptic number.

198185419 is a deficient number, since it is larger than the sum of its proper divisors (1).

198185419 is an equidigital number, since it uses as much as digits as its factorization.

198185419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 46.

The square root of 198185419 is about 14077.8343149790. The cubic root of 198185419 is about 583.0295493262.

The spelling of 198185419 in words is "one hundred ninety-eight million, one hundred eighty-five thousand, four hundred nineteen".