12646969 has 2 divisors, whose sum is σ = 12646970. Its totient is φ = 12646968.

The previous prime is 12646961. The next prime is 12646979. The reversal of 12646969 is 96964621.

It is a happy number.

12646969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10810944 + 1836025 = 3288^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 12646969 - 2³ = 12646961 is a prime.

It is a super-2 number, since 2×12646969² = 319891649773922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12646961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323484 + 6323485.

It is an arithmetic number, because the mean of its divisors is an integer number (6323485).

Almost surely, 2^12646969 is an apocalyptic number.

It is an amenable number.

12646969 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646969 is an equidigital number, since it uses as much as digits as its factorization.

12646969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 12646969 is about 3556.2577240689. The cubic root of 12646969 is about 232.9854596218.

The spelling of 12646969 in words is "twelve million, six hundred forty-six thousand, nine hundred sixty-nine".