12637949 has 2 divisors, whose sum is σ = 12637950. Its totient is φ = 12637948.

The previous prime is 12637921. The next prime is 12637951. The reversal of 12637949 is 94973621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6853924 + 5784025 = 2618^2 + 2405^2 .

It is an emirp because it is prime and its reverse (94973621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12637949 - 2⁸ = 12637693 is a prime.

Together with 12637951, 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 (12637909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318974 + 6318975.

It is an arithmetic number, because the mean of its divisors is an integer number (6318975).

Almost surely, 2^12637949 is an apocalyptic number.

It is an amenable number.

12637949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637949 is an equidigital number, since it uses as much as digits as its factorization.

12637949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 12637949 is about 3554.9893108137. The cubic root of 12637949 is about 232.9300569226.

The spelling of 12637949 in words is "twelve million, six hundred thirty-seven thousand, nine hundred forty-nine".