12637789 has 2 divisors, whose sum is σ = 12637790. Its totient is φ = 12637788.

The previous prime is 12637763. The next prime is 12637811. The reversal of 12637789 is 98773621.

It is a happy number.

12637789 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9504889 + 3132900 = 3083^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637789 - 2⁹ = 12637277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318894 + 6318895.

It is an arithmetic number, because the mean of its divisors is an integer number (6318895).

Almost surely, 2^12637789 is an apocalyptic number.

It is an amenable number.

12637789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637789 is an equidigital number, since it uses as much as digits as its factorization.

12637789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 12637789 is about 3554.9668071587. The cubic root of 12637789 is about 232.9290739317.

The spelling of 12637789 in words is "twelve million, six hundred thirty-seven thousand, seven hundred eighty-nine".