342081209 has 2 divisors, whose sum is σ = 342081210. Its totient is φ = 342081208.

The previous prime is 342081161. The next prime is 342081221. The reversal of 342081209 is 902180243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243516025 + 98565184 = 15605^2 + 9928^2 .

It is an emirp because it is prime and its reverse (902180243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342081209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342081269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171040604 + 171040605.

It is an arithmetic number, because the mean of its divisors is an integer number (171040605).

Almost surely, 2^342081209 is an apocalyptic number.

It is an amenable number.

342081209 is a deficient number, since it is larger than the sum of its proper divisors (1).

342081209 is an equidigital number, since it uses as much as digits as its factorization.

342081209 is an odious number, because the sum of its binary digits is odd.

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

The square root of 342081209 is about 18495.4375184801. The cubic root of 342081209 is about 699.3744131913.

The spelling of 342081209 in words is "three hundred forty-two million, eighty-one thousand, two hundred nine".