12913709 has 2 divisors, whose sum is σ = 12913710. Its totient is φ = 12913708.

The previous prime is 12913697. The next prime is 12913739. The reversal of 12913709 is 90731921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11526025 + 1387684 = 3395^2 + 1178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12913709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12913739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6456854 + 6456855.

It is an arithmetic number, because the mean of its divisors is an integer number (6456855).

Almost surely, 2^12913709 is an apocalyptic number.

It is an amenable number.

12913709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12913709 is an equidigital number, since it uses as much as digits as its factorization.

12913709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 12913709 is about 3593.5649430614. The cubic root of 12913709 is about 234.6120594985.

The spelling of 12913709 in words is "twelve million, nine hundred thirteen thousand, seven hundred nine".