304152509 has 2 divisors, whose sum is σ = 304152510. Its totient is φ = 304152508.

The previous prime is 304152481. The next prime is 304152517. The reversal of 304152509 is 905251403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245016409 + 59136100 = 15653^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 304152509 - 2¹² = 304148413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304152539) 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, 152076254 + 152076255.

It is an arithmetic number, because the mean of its divisors is an integer number (152076255).

Almost surely, 2^304152509 is an apocalyptic number.

It is an amenable number.

304152509 is a deficient number, since it is larger than the sum of its proper divisors (1).

304152509 is an equidigital number, since it uses as much as digits as its factorization.

304152509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 304152509 is about 17439.9687213022. The cubic root of 304152509 is about 672.5075036821.

The spelling of 304152509 in words is "three hundred four million, one hundred fifty-two thousand, five hundred nine".