304213139 has 2 divisors, whose sum is σ = 304213140. Its totient is φ = 304213138.

The previous prime is 304213099. The next prime is 304213159. The reversal of 304213139 is 931312403.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 304213139 - 2²⁴ = 287435923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (304213159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152106569 + 152106570.

It is an arithmetic number, because the mean of its divisors is an integer number (152106570).

Almost surely, 2^304213139 is an apocalyptic number.

304213139 is a deficient number, since it is larger than the sum of its proper divisors (1).

304213139 is an equidigital number, since it uses as much as digits as its factorization.

304213139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 304213139 is about 17441.7068832153. The cubic root of 304213139 is about 672.5521867712.

The spelling of 304213139 in words is "three hundred four million, two hundred thirteen thousand, one hundred thirty-nine".