306342409 has 2 divisors, whose sum is σ = 306342410. Its totient is φ = 306342408.

The previous prime is 306342401. The next prime is 306342419. The reversal of 306342409 is 904243603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241491600 + 64850809 = 15540^2 + 8053^2 .

It is a cyclic number.

It is not a de Polignac number, because 306342409 - 2³ = 306342401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (306342401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153171204 + 153171205.

It is an arithmetic number, because the mean of its divisors is an integer number (153171205).

Almost surely, 2^306342409 is an apocalyptic number.

It is an amenable number.

306342409 is a deficient number, since it is larger than the sum of its proper divisors (1).

306342409 is an equidigital number, since it uses as much as digits as its factorization.

306342409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 306342409 is about 17502.6400580027. The cubic root of 306342409 is about 674.1176648878.

The spelling of 306342409 in words is "three hundred six million, three hundred forty-two thousand, four hundred nine".