199342379 has 2 divisors, whose sum is σ = 199342380. Its totient is φ = 199342378.

The previous prime is 199342349. The next prime is 199342399. The reversal of 199342379 is 973243991.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (973243991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199342379 - 2¹² = 199338283 is a prime.

It is not a weakly prime, because it can be changed into another prime (199342349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99671189 + 99671190.

It is an arithmetic number, because the mean of its divisors is an integer number (99671190).

Almost surely, 2^199342379 is an apocalyptic number.

199342379 is a deficient number, since it is larger than the sum of its proper divisors (1).

199342379 is an equidigital number, since it uses as much as digits as its factorization.

199342379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 47.

The square root of 199342379 is about 14118.8660663667. The cubic root of 199342379 is about 584.1618786799.

The spelling of 199342379 in words is "one hundred ninety-nine million, three hundred forty-two thousand, three hundred seventy-nine".