12977938 has 4 divisors (see below), whose sum is σ = 19466910. Its totient is φ = 6488968.

The previous prime is 12977929. The next prime is 12977947. The reversal of 12977938 is 83977921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83977921 = 691 ⋅121531.

It is an interprime number because it is at equal distance from previous prime (12977929) and next prime (12977947).

It can be written as a sum of positive squares in only one way, i.e., 11923209 + 1054729 = 3453^2 + 1027^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244483 + ... + 3244486.

Almost surely, 2^12977938 is an apocalyptic number.

12977938 is a deficient number, since it is larger than the sum of its proper divisors (6488972).

12977938 is an equidigital number, since it uses as much as digits as its factorization.

12977938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488971.

The product of its digits is 190512, while the sum is 46.

The square root of 12977938 is about 3602.4905273991. The cubic root of 12977938 is about 235.0003802619. Note that the first 3 decimals are identical.

The spelling of 12977938 in words is "twelve million, nine hundred seventy-seven thousand, nine hundred thirty-eight".