199676819 has 2 divisors, whose sum is σ = 199676820. Its totient is φ = 199676818.

The previous prime is 199676801. The next prime is 199676843. The reversal of 199676819 is 918676991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199676819 - 2¹² = 199672723 is a prime.

It is a super-2 number, since 2×199676819² = 79741664091917522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199676879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99838409 + 99838410.

It is an arithmetic number, because the mean of its divisors is an integer number (99838410).

Almost surely, 2^199676819 is an apocalyptic number.

199676819 is a deficient number, since it is larger than the sum of its proper divisors (1).

199676819 is an equidigital number, since it uses as much as digits as its factorization.

199676819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 56.

The square root of 199676819 is about 14130.7048302624. The cubic root of 199676819 is about 584.4883821635.

The spelling of 199676819 in words is "one hundred ninety-nine million, six hundred seventy-six thousand, eight hundred nineteen".