12637213 has 2 divisors, whose sum is σ = 12637214. Its totient is φ = 12637212.

The previous prime is 12637201. The next prime is 12637237. The reversal of 12637213 is 31273621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 1996569 = 3262^2 + 1413^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637213 - 2¹³ = 12629021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12637253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6318606 + 6318607.

It is an arithmetic number, because the mean of its divisors is an integer number (6318607).

Almost surely, 2^12637213 is an apocalyptic number.

It is an amenable number.

12637213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12637213 is an equidigital number, since it uses as much as digits as its factorization.

12637213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 12637213 is about 3554.8857928209. The cubic root of 12637213 is about 232.9255350958.

The spelling of 12637213 in words is "twelve million, six hundred thirty-seven thousand, two hundred thirteen".