342991919 has 2 divisors, whose sum is σ = 342991920. Its totient is φ = 342991918.

The previous prime is 342991897. The next prime is 342991921. The reversal of 342991919 is 919199243.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 342991919 - 2²⁸ = 74556463 is a prime.

It is a super-2 number, since 2×342991919² = 235286912998605122, which contains 22 as substring.

Together with 342991921, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_18446996 and since 342991919 and 18446996 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342991969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171495959 + 171495960.

It is an arithmetic number, because the mean of its divisors is an integer number (171495960).

Almost surely, 2^342991919 is an apocalyptic number.

342991919 is a deficient number, since it is larger than the sum of its proper divisors (1).

342991919 is an equidigital number, since it uses as much as digits as its factorization.

342991919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 47.

The square root of 342991919 is about 18520.0410096738. The cubic root of 342991919 is about 699.9945026779.

The spelling of 342991919 in words is "three hundred forty-two million, nine hundred ninety-one thousand, nine hundred nineteen".