342904321 has 2 divisors, whose sum is σ = 342904322. Its totient is φ = 342904320.

The previous prime is 342904313. The next prime is 342904337. The reversal of 342904321 is 123409243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187553025 + 155351296 = 13695^2 + 12464^2 .

It is a cyclic number.

It is not a de Polignac number, because 342904321 - 2³ = 342904313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 342904321.

It is not a weakly prime, because it can be changed into another prime (342904301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171452160 + 171452161.

It is an arithmetic number, because the mean of its divisors is an integer number (171452161).

Almost surely, 2^342904321 is an apocalyptic number.

It is an amenable number.

342904321 is a deficient number, since it is larger than the sum of its proper divisors (1).

342904321 is an equidigital number, since it uses as much as digits as its factorization.

342904321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 342904321 is about 18517.6759070894. The cubic root of 342904321 is about 699.9349061919.

The spelling of 342904321 in words is "three hundred forty-two million, nine hundred four thousand, three hundred twenty-one".