12311938 has 4 divisors (see below), whose sum is σ = 18467910. Its totient is φ = 6155968.

The previous prime is 12311933. The next prime is 12311939. The reversal of 12311938 is 83911321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12201049 + 110889 = 3493^2 + 333^2 .

It is not an unprimeable number, because it can be changed into a prime (12311933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3077983 + ... + 3077986.

Almost surely, 2^12311938 is an apocalyptic number.

12311938 is a deficient number, since it is larger than the sum of its proper divisors (6155972).

12311938 is an equidigital number, since it uses as much as digits as its factorization.

12311938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155971.

The product of its digits is 1296, while the sum is 28.

The square root of 12311938 is about 3508.8371293065. The cubic root of 12311938 is about 230.9096802751.

The spelling of 12311938 in words is "twelve million, three hundred eleven thousand, nine hundred thirty-eight".