1307239391 has 2 divisors, whose sum is σ = 1307239392. Its totient is φ = 1307239390.

The previous prime is 1307239363. The next prime is 1307239393. The reversal of 1307239391 is 1939327031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1307239391 - 2¹⁸ = 1306977247 is a prime.

Together with 1307239393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1307239393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653619695 + 653619696.

It is an arithmetic number, because the mean of its divisors is an integer number (653619696).

Almost surely, 2^1307239391 is an apocalyptic number.

1307239391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307239391 is an equidigital number, since it uses as much as digits as its factorization.

1307239391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 1307239391 is about 36155.7656674561. The cubic root of 1307239391 is about 1093.4150365793.

The spelling of 1307239391 in words is "one billion, three hundred seven million, two hundred thirty-nine thousand, three hundred ninety-one".