342509381 has 2 divisors, whose sum is σ = 342509382. Its totient is φ = 342509380.

The previous prime is 342509347. The next prime is 342509383. The reversal of 342509381 is 183905243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292581025 + 49928356 = 17105^2 + 7066^2 .

It is a cyclic number.

It is not a de Polignac number, because 342509381 - 2¹⁸ = 342247237 is a prime.

It is a super-2 number, since 2×342509381² = 234625352146006322, which contains 22 as substring.

Together with 342509383, 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 (342509383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171254690 + 171254691.

It is an arithmetic number, because the mean of its divisors is an integer number (171254691).

Almost surely, 2^342509381 is an apocalyptic number.

It is an amenable number.

342509381 is a deficient number, since it is larger than the sum of its proper divisors (1).

342509381 is an equidigital number, since it uses as much as digits as its factorization.

342509381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 342509381 is about 18507.0089695769. The cubic root of 342509381 is about 699.6660863202. Note that the first 3 decimals are identical.

The spelling of 342509381 in words is "three hundred forty-two million, five hundred nine thousand, three hundred eighty-one".