12661293839 has 2 divisors, whose sum is σ = 12661293840. Its totient is φ = 12661293838.

The previous prime is 12661293793. The next prime is 12661293863. The reversal of 12661293839 is 93839216621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12661293839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12661203839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330646919 + 6330646920.

It is an arithmetic number, because the mean of its divisors is an integer number (6330646920).

Almost surely, 2^12661293839 is an apocalyptic number.

12661293839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661293839 is an equidigital number, since it uses as much as digits as its factorization.

12661293839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The spelling of 12661293839 in words is "twelve billion, six hundred sixty-one million, two hundred ninety-three thousand, eight hundred thirty-nine".