12638357 has 2 divisors, whose sum is σ = 12638358. Its totient is φ = 12638356.

The previous prime is 12638333. The next prime is 12638369. The reversal of 12638357 is 75383621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10201636 + 2436721 = 3194^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 12638357 - 2¹⁰ = 12637333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12638377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6319178 + 6319179.

It is an arithmetic number, because the mean of its divisors is an integer number (6319179).

Almost surely, 2^12638357 is an apocalyptic number.

It is an amenable number.

12638357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12638357 is an equidigital number, since it uses as much as digits as its factorization.

12638357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 12638357 is about 3555.0466944894. The cubic root of 12638357 is about 232.9325635118.

It can be divided in two parts, 126 and 38357, that added together give a palindrome (38483).

The spelling of 12638357 in words is "twelve million, six hundred thirty-eight thousand, three hundred fifty-seven".