12775639 has 2 divisors, whose sum is σ = 12775640. Its totient is φ = 12775638.

The previous prime is 12775621. The next prime is 12775663. The reversal of 12775639 is 93657721.

12775639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12775639 - 2¹⁵ = 12742871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12775739) 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, 6387819 + 6387820.

It is an arithmetic number, because the mean of its divisors is an integer number (6387820).

Almost surely, 2^12775639 is an apocalyptic number.

12775639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12775639 is an equidigital number, since it uses as much as digits as its factorization.

12775639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 12775639 is about 3574.3025893173. The cubic root of 12775639 is about 233.7729248203.

The spelling of 12775639 in words is "twelve million, seven hundred seventy-five thousand, six hundred thirty-nine".