12687319031 has 2 divisors, whose sum is σ = 12687319032. Its totient is φ = 12687319030.

The previous prime is 12687319009. The next prime is 12687319049. The reversal of 12687319031 is 13091378621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12687319031 - 2²⁶ = 12620210167 is a prime.

It is a super-2 number, since 2×12687319031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12687319031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12687312031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343659515 + 6343659516.

It is an arithmetic number, because the mean of its divisors is an integer number (6343659516).

Almost surely, 2^12687319031 is an apocalyptic number.

12687319031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12687319031 is an equidigital number, since it uses as much as digits as its factorization.

12687319031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 12687319031 in words is "twelve billion, six hundred eighty-seven million, three hundred nineteen thousand, thirty-one".