199997419 has 2 divisors, whose sum is σ = 199997420. Its totient is φ = 199997418.

The previous prime is 199997417. The next prime is 199997423. The reversal of 199997419 is 914799991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199997419 - 2¹ = 199997417 is a prime.

It is a super-2 number, since 2×199997419² = 79997935213323122, which contains 22 as substring.

Together with 199997417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199997417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99998709 + 99998710.

It is an arithmetic number, because the mean of its divisors is an integer number (99998710).

Almost surely, 2^199997419 is an apocalyptic number.

199997419 is a deficient number, since it is larger than the sum of its proper divisors (1).

199997419 is an equidigital number, since it uses as much as digits as its factorization.

199997419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 58.

The square root of 199997419 is about 14142.0443713064. The cubic root of 199997419 is about 584.8010320018.

The spelling of 199997419 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred nineteen".