304021139 has 2 divisors, whose sum is σ = 304021140. Its totient is φ = 304021138.

The previous prime is 304021121. The next prime is 304021163. The reversal of 304021139 is 931120403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 304021139 - 2²⁰ = 302972563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (304021169) 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, 152010569 + 152010570.

It is an arithmetic number, because the mean of its divisors is an integer number (152010570).

Almost surely, 2^304021139 is an apocalyptic number.

304021139 is a deficient number, since it is larger than the sum of its proper divisors (1).

304021139 is an equidigital number, since it uses as much as digits as its factorization.

304021139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 304021139 is about 17436.2019660246. The cubic root of 304021139 is about 672.4106662613.

The spelling of 304021139 in words is "three hundred four million, twenty-one thousand, one hundred thirty-nine".