342108209 has 2 divisors, whose sum is σ = 342108210. Its totient is φ = 342108208.

The previous prime is 342108197. The next prime is 342108271. The reversal of 342108209 is 902801243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311416609 + 30691600 = 17647^2 + 5540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342108209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342101209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171054104 + 171054105.

It is an arithmetic number, because the mean of its divisors is an integer number (171054105).

Almost surely, 2^342108209 is an apocalyptic number.

It is an amenable number.

342108209 is a deficient number, since it is larger than the sum of its proper divisors (1).

342108209 is an equidigital number, since it uses as much as digits as its factorization.

342108209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 342108209 is about 18496.1674138185. The cubic root of 342108209 is about 699.3928129279.

The spelling of 342108209 in words is "three hundred forty-two million, one hundred eight thousand, two hundred nine".