342978199 has 2 divisors, whose sum is σ = 342978200. Its totient is φ = 342978198.

The previous prime is 342978187. The next prime is 342978217. The reversal of 342978199 is 991879243.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 342978199 - 2⁷ = 342978071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342958199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171489099 + 171489100.

It is an arithmetic number, because the mean of its divisors is an integer number (171489100).

Almost surely, 2^342978199 is an apocalyptic number.

342978199 is a deficient number, since it is larger than the sum of its proper divisors (1).

342978199 is an equidigital number, since it uses as much as digits as its factorization.

342978199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 342978199 is about 18519.6705964226. The cubic root of 342978199 is about 699.9851690735.

The spelling of 342978199 in words is "three hundred forty-two million, nine hundred seventy-eight thousand, one hundred ninety-nine".