342545309 has 2 divisors, whose sum is σ = 342545310. Its totient is φ = 342545308.

The previous prime is 342545263. The next prime is 342545341. The reversal of 342545309 is 903545243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341695225 + 850084 = 18485^2 + 922^2 .

It is an emirp because it is prime and its reverse (903545243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342545309 - 2²⁰ = 341496733 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 (342545389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171272654 + 171272655.

It is an arithmetic number, because the mean of its divisors is an integer number (171272655).

Almost surely, 2^342545309 is an apocalyptic number.

It is an amenable number.

342545309 is a deficient number, since it is larger than the sum of its proper divisors (1).

342545309 is an equidigital number, since it uses as much as digits as its factorization.

342545309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 342545309 is about 18507.9796034035. The cubic root of 342545309 is about 699.6905496154.

The spelling of 342545309 in words is "three hundred forty-two million, five hundred forty-five thousand, three hundred nine".