12689932529 has 2 divisors, whose sum is σ = 12689932530. Its totient is φ = 12689932528.

The previous prime is 12689932483. The next prime is 12689932571. The reversal of 12689932529 is 92523998621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8122876129 + 4567056400 = 90127^2 + 67580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12689932529 is a prime.

It is a super-2 number, since 2×12689932529² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12689938529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344966264 + 6344966265.

It is an arithmetic number, because the mean of its divisors is an integer number (6344966265).

Almost surely, 2^12689932529 is an apocalyptic number.

It is an amenable number.

12689932529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12689932529 is an equidigital number, since it uses as much as digits as its factorization.

12689932529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 56.

The spelling of 12689932529 in words is "twelve billion, six hundred eighty-nine million, nine hundred thirty-two thousand, five hundred twenty-nine".