12695244239 has 2 divisors, whose sum is σ = 12695244240. Its totient is φ = 12695244238.

The previous prime is 12695244227. The next prime is 12695244257. The reversal of 12695244239 is 93244259621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12695244239 is a prime.

It is a super-2 number, since 2×12695244239² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12695244193 and 12695244202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12695744239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347622119 + 6347622120.

It is an arithmetic number, because the mean of its divisors is an integer number (6347622120).

Almost surely, 2^12695244239 is an apocalyptic number.

12695244239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12695244239 is an equidigital number, since it uses as much as digits as its factorization.

12695244239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The spelling of 12695244239 in words is "twelve billion, six hundred ninety-five million, two hundred forty-four thousand, two hundred thirty-nine".