12397739 has 2 divisors, whose sum is σ = 12397740. Its totient is φ = 12397738.

The previous prime is 12397733. The next prime is 12397753. The reversal of 12397739 is 93779321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12397739 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12397696 and 12397705.

It is not a weakly prime, because it can be changed into another prime (12397733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6198869 + 6198870.

It is an arithmetic number, because the mean of its divisors is an integer number (6198870).

Almost surely, 2^12397739 is an apocalyptic number.

12397739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12397739 is an equidigital number, since it uses as much as digits as its factorization.

12397739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 41.

The square root of 12397739 is about 3521.0423172691. The cubic root of 12397739 is about 231.4448366247. Note that the first 3 decimals are identical.

The spelling of 12397739 in words is "twelve million, three hundred ninety-seven thousand, seven hundred thirty-nine".