199399 has 2 divisors, whose sum is σ = 199400. Its totient is φ = 199398.

The previous prime is 199379. The next prime is 199403. The reversal of 199399 is 993991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199399 - 2¹⁵ = 166631 is a prime.

It is a super-2 number, since 2×199399² = 79519922402, 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 (199379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99699 + 99700.

It is an arithmetic number, because the mean of its divisors is an integer number (99700).

2¹⁹⁹³⁹⁹ is an apocalyptic number.

199399 is a deficient number, since it is larger than the sum of its proper divisors (1).

199399 is an equidigital number, since it uses as much as digits as its factorization.

199399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19683, while the sum is 40.

The square root of 199399 is about 446.5411515191. The cubic root of 199399 is about 58.4217181686.

It can be divided in two parts, 199 and 399, that multiplied together give a triangular number (79401 = T₃₉₈).

The spelling of 199399 in words is "one hundred ninety-nine thousand, three hundred ninety-nine".