307399139 has 2 divisors, whose sum is σ = 307399140. Its totient is φ = 307399138.

The previous prime is 307399133. The next prime is 307399189. The reversal of 307399139 is 931993703.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 307399139 - 2¹⁶ = 307333603 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 307399139.

It is not a weakly prime, because it can be changed into another prime (307399133) 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, 153699569 + 153699570.

It is an arithmetic number, because the mean of its divisors is an integer number (153699570).

Almost surely, 2^307399139 is an apocalyptic number.

307399139 is a deficient number, since it is larger than the sum of its proper divisors (1).

307399139 is an equidigital number, since it uses as much as digits as its factorization.

307399139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 307399139 is about 17532.8018011954. The cubic root of 307399139 is about 674.8918996527.

The spelling of 307399139 in words is "three hundred seven million, three hundred ninety-nine thousand, one hundred thirty-nine".