12929789 has 2 divisors, whose sum is σ = 12929790. Its totient is φ = 12929788.

The previous prime is 12929783. The next prime is 12929803. The reversal of 12929789 is 98792921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 574564 = 3515^2 + 758^2 .

It is an emirp because it is prime and its reverse (98792921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12929789 - 2⁸ = 12929533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12929783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464894 + 6464895.

It is an arithmetic number, because the mean of its divisors is an integer number (6464895).

Almost surely, 2^12929789 is an apocalyptic number.

It is an amenable number.

12929789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12929789 is an equidigital number, since it uses as much as digits as its factorization.

12929789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 12929789 is about 3595.8015796203. The cubic root of 12929789 is about 234.7093978425.

The spelling of 12929789 in words is "twelve million, nine hundred twenty-nine thousand, seven hundred eighty-nine".