199450399 has 2 divisors, whose sum is σ = 199450400. Its totient is φ = 199450398.

The previous prime is 199450397. The next prime is 199450439. The reversal of 199450399 is 993054991.

It is a weak prime.

It is an emirp because it is prime and its reverse (993054991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199450399 - 2¹ = 199450397 is a prime.

It is a super-2 number, since 2×199450399² = 79560923322518402, which contains 22 as substring.

Together with 199450397, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199450397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99725199 + 99725200.

It is an arithmetic number, because the mean of its divisors is an integer number (99725200).

Almost surely, 2^199450399 is an apocalyptic number.

199450399 is a deficient number, since it is larger than the sum of its proper divisors (1).

199450399 is an equidigital number, since it uses as much as digits as its factorization.

199450399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 199450399 is about 14122.6909263072. The cubic root of 199450399 is about 584.2673751831.

The spelling of 199450399 in words is "one hundred ninety-nine million, four hundred fifty thousand, three hundred ninety-nine".