199189469 has 2 divisors, whose sum is σ = 199189470. Its totient is φ = 199189468.

The previous prime is 199189447. The next prime is 199189513. The reversal of 199189469 is 964981991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121837444 + 77352025 = 11038^2 + 8795^2 .

It is an emirp because it is prime and its reverse (964981991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199189469 - 2²⁰ = 198140893 is a prime.

It is a super-2 number, since 2×199189469² = 79352889121003922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199189409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99594734 + 99594735.

It is an arithmetic number, because the mean of its divisors is an integer number (99594735).

Almost surely, 2^199189469 is an apocalyptic number.

It is an amenable number.

199189469 is a deficient number, since it is larger than the sum of its proper divisors (1).

199189469 is an equidigital number, since it uses as much as digits as its factorization.

199189469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 56.

The square root of 199189469 is about 14113.4499325998. The cubic root of 199189469 is about 584.0124756905.

The spelling of 199189469 in words is "one hundred ninety-nine million, one hundred eighty-nine thousand, four hundred sixty-nine".