12978629 has 2 divisors, whose sum is σ = 12978630. Its totient is φ = 12978628.

The previous prime is 12978619. The next prime is 12978659. The reversal of 12978629 is 92687921.

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., 12974404 + 4225 = 3602^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 12978629 - 2⁴ = 12978613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12978629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12978619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489314 + 6489315.

It is an arithmetic number, because the mean of its divisors is an integer number (6489315).

Almost surely, 2^12978629 is an apocalyptic number.

It is an amenable number.

12978629 is a deficient number, since it is larger than the sum of its proper divisors (1).

12978629 is an equidigital number, since it uses as much as digits as its factorization.

12978629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 12978629 is about 3602.5864319958. The cubic root of 12978629 is about 235.0045509908.

The spelling of 12978629 in words is "twelve million, nine hundred seventy-eight thousand, six hundred twenty-nine".