12670639 has 2 divisors, whose sum is σ = 12670640. Its totient is φ = 12670638.

The previous prime is 12670621. The next prime is 12670649. The reversal of 12670639 is 93607621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12670639 - 2⁵ = 12670607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12670649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6335319 + 6335320.

It is an arithmetic number, because the mean of its divisors is an integer number (6335320).

Almost surely, 2^12670639 is an apocalyptic number.

12670639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12670639 is an equidigital number, since it uses as much as digits as its factorization.

12670639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 12670639 is about 3559.5841049201. The cubic root of 12670639 is about 233.1307204858.

The spelling of 12670639 in words is "twelve million, six hundred seventy thousand, six hundred thirty-nine".