342509509 has 2 divisors, whose sum is σ = 342509510. Its totient is φ = 342509508.

The previous prime is 342509471. The next prime is 342509513. The reversal of 342509509 is 905905243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240560100 + 101949409 = 15510^2 + 10097^2 .

It is a cyclic number.

It is not a de Polignac number, because 342509509 - 2⁷ = 342509381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342509549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171254754 + 171254755.

It is an arithmetic number, because the mean of its divisors is an integer number (171254755).

Almost surely, 2^342509509 is an apocalyptic number.

It is an amenable number.

342509509 is a deficient number, since it is larger than the sum of its proper divisors (1).

342509509 is an equidigital number, since it uses as much as digits as its factorization.

342509509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 342509509 is about 18507.0124277259. The cubic root of 342509509 is about 699.6661734782. Note that the first 3 decimals are identical.

The spelling of 342509509 in words is "three hundred forty-two million, five hundred nine thousand, five hundred nine".