12637517 has 2 divisors, whose sum is σ = 12637518. Its totient is φ = 12637516.

The previous prime is 12637507. The next prime is 12637519. The reversal of 12637517 is 71573621.

12637517 is digitally balanced in base 3, because in such base 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., 7557001 + 5080516 = 2749^2 + 2254^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637517 - 2⁶ = 12637453 is a prime.

Together with 12637519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318758 + 6318759.

It is an arithmetic number, because the mean of its divisors is an integer number (6318759).

Almost surely, 2^12637517 is an apocalyptic number.

It is an amenable number.

12637517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637517 is an equidigital number, since it uses as much as digits as its factorization.

12637517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 32.

The square root of 12637517 is about 3554.9285506181. The cubic root of 12637517 is about 232.9274028281.

The spelling of 12637517 in words is "twelve million, six hundred thirty-seven thousand, five hundred seventeen".