1296937139 has 2 divisors, whose sum is σ = 1296937140. Its totient is φ = 1296937138.

The previous prime is 1296937121. The next prime is 1296937163. The reversal of 1296937139 is 9317396921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296937139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1296939139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648468569 + 648468570.

It is an arithmetic number, because the mean of its divisors is an integer number (648468570).

Almost surely, 2^1296937139 is an apocalyptic number.

1296937139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296937139 is an equidigital number, since it uses as much as digits as its factorization.

1296937139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 50.

The square root of 1296937139 is about 36013.0134673565. The cubic root of 1296937139 is about 1090.5350847556.

The spelling of 1296937139 in words is "one billion, two hundred ninety-six million, nine hundred thirty-seven thousand, one hundred thirty-nine".