12977994241 has 3 divisors (see below), whose sum is σ = 12978108163. Its totient is φ = 12977880320.

The previous prime is 12977994233. The next prime is 12977994257. The reversal of 12977994241 is 14249977921.

It is a happy number.

The square root of 12977994241 is 113921.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3615496641 + 9362497600 = 60129^2 + 96760^2 .

It is not a de Polignac number, because 12977994241 - 2³ = 12977994233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12977994641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56961 + ... + 170881.

Almost surely, 2^12977994241 is an apocalyptic number.

12977994241 is the 113921-st square number.

12977994241 is the 56961-st centered octagonal number.

It is an amenable number.

12977994241 is a deficient number, since it is larger than the sum of its proper divisors (113922).

12977994241 is an frugal number, since it uses more digits than its factorization.

12977994241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227842 (or 113921 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 12977994241 in words is "twelve billion, nine hundred seventy-seven million, nine hundred ninety-four thousand, two hundred forty-one".