199213019 has 2 divisors, whose sum is σ = 199213020. Its totient is φ = 199213018.

The previous prime is 199213009. The next prime is 199213057. The reversal of 199213019 is 910312991.

199213019 is nontrivially palindromic in base 16.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199213019 - 2¹⁶ = 199147483 is a prime.

It is a super-2 number, since 2×199213019² = 79371653878188722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199213019.

It is not a weakly prime, because it can be changed into another prime (199213009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99606509 + 99606510.

It is an arithmetic number, because the mean of its divisors is an integer number (99606510).

Almost surely, 2^199213019 is an apocalyptic number.

199213019 is a deficient number, since it is larger than the sum of its proper divisors (1).

199213019 is an equidigital number, since it uses as much as digits as its factorization.

199213019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 199213019 is about 14114.2842184788. The cubic root of 199213019 is about 584.0354905482.

The spelling of 199213019 in words is "one hundred ninety-nine million, two hundred thirteen thousand, nineteen".