305413139 has 2 divisors, whose sum is σ = 305413140. Its totient is φ = 305413138.

The previous prime is 305413079. The next prime is 305413169. The reversal of 305413139 is 931314503.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305413139 is a prime.

It is not a weakly prime, because it can be changed into another prime (305413169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152706569 + 152706570.

It is an arithmetic number, because the mean of its divisors is an integer number (152706570).

Almost surely, 2^305413139 is an apocalyptic number.

305413139 is a deficient number, since it is larger than the sum of its proper divisors (1).

305413139 is an equidigital number, since it uses as much as digits as its factorization.

305413139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 305413139 is about 17476.0733289833. The cubic root of 305413139 is about 673.4353436325.

The spelling of 305413139 in words is "three hundred five million, four hundred thirteen thousand, one hundred thirty-nine".