12381937 has 2 divisors, whose sum is σ = 12381938. Its totient is φ = 12381936.

The previous prime is 12381931. The next prime is 12381949. The reversal of 12381937 is 73918321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 4769856 = 2759^2 + 2184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12381937 is a prime.

It is not a weakly prime, because it can be changed into another prime (12381931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6190968 + 6190969.

It is an arithmetic number, because the mean of its divisors is an integer number (6190969).

Almost surely, 2^12381937 is an apocalyptic number.

It is an amenable number.

12381937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381937 is an equidigital number, since it uses as much as digits as its factorization.

12381937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 12381937 is about 3518.7976639756. The cubic root of 12381937 is about 231.3464626052.

The spelling of 12381937 in words is "twelve million, three hundred eighty-one thousand, nine hundred thirty-seven".