12311939 has 2 divisors, whose sum is σ = 12311940. Its totient is φ = 12311938.

The previous prime is 12311933. The next prime is 12311951. The reversal of 12311939 is 93911321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12311939 - 2⁸ = 12311683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12311933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155969 + 6155970.

It is an arithmetic number, because the mean of its divisors is an integer number (6155970).

Almost surely, 2^12311939 is an apocalyptic number.

12311939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311939 is an equidigital number, since it uses as much as digits as its factorization.

12311939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 29.

The square root of 12311939 is about 3508.8372718039. The cubic root of 12311939 is about 230.9096865268.

The spelling of 12311939 in words is "twelve million, three hundred eleven thousand, nine hundred thirty-nine".