342989819 has 2 divisors, whose sum is σ = 342989820. Its totient is φ = 342989818.

The previous prime is 342989809. The next prime is 342989821. The reversal of 342989819 is 918989243.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 342989819 - 2¹² = 342985723 is a prime.

It is a super-2 number, since 2×342989819² = 235284031875305522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 342989821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342989809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171494909 + 171494910.

It is an arithmetic number, because the mean of its divisors is an integer number (171494910).

Almost surely, 2^342989819 is an apocalyptic number.

342989819 is a deficient number, since it is larger than the sum of its proper divisors (1).

342989819 is an equidigital number, since it uses as much as digits as its factorization.

342989819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 342989819 is about 18519.9843142482. The cubic root of 342989819 is about 699.9930740811.

The spelling of 342989819 in words is "three hundred forty-two million, nine hundred eighty-nine thousand, eight hundred nineteen".