12637279 has 2 divisors, whose sum is σ = 12637280. Its totient is φ = 12637278.

The previous prime is 12637277. The next prime is 12637297. The reversal of 12637279 is 97273621.

12637279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (12637297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12637279 - 2¹ = 12637277 is a prime.

Together with 12637277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318639 + 6318640.

It is an arithmetic number, because the mean of its divisors is an integer number (6318640).

Almost surely, 2^12637279 is an apocalyptic number.

12637279 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637279 is an equidigital number, since it uses as much as digits as its factorization.

12637279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 12637279 is about 3554.8950758074. The cubic root of 12637279 is about 232.9259405928.

The spelling of 12637279 in words is "twelve million, six hundred thirty-seven thousand, two hundred seventy-nine".