12393937 has 2 divisors, whose sum is σ = 12393938. Its totient is φ = 12393936.

The previous prime is 12393923. The next prime is 12393949. The reversal of 12393937 is 73939321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 5716881 = 2584^2 + 2391^2 .

It is an emirp because it is prime and its reverse (73939321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12393937 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12393896 and 12393905.

It is not a weakly prime, because it can be changed into another prime (12393967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6196968 + 6196969.

It is an arithmetic number, because the mean of its divisors is an integer number (6196969).

Almost surely, 2^12393937 is an apocalyptic number.

It is an amenable number.

12393937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12393937 is an equidigital number, since it uses as much as digits as its factorization.

12393937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 37.

The square root of 12393937 is about 3520.5023789226. The cubic root of 12393937 is about 231.4211752341.

The spelling of 12393937 in words is "twelve million, three hundred ninety-three thousand, nine hundred thirty-seven".