12977399 has 4 divisors (see below), whose sum is σ = 13660440. Its totient is φ = 12294360.

The previous prime is 12977383. The next prime is 12977407. The reversal of 12977399 is 99377921.

12977399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12977399 - 2⁴ = 12977383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12977329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341492 + ... + 341529.

It is an arithmetic number, because the mean of its divisors is an integer number (3415110).

Almost surely, 2^12977399 is an apocalyptic number.

12977399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12977399 is a deficient number, since it is larger than the sum of its proper divisors (683041).

12977399 is an equidigital number, since it uses as much as digits as its factorization.

12977399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683040.

The product of its digits is 214326, while the sum is 47.

The square root of 12977399 is about 3602.4157172653. The cubic root of 12977399 is about 234.9971268700.

The spelling of 12977399 in words is "twelve million, nine hundred seventy-seven thousand, three hundred ninety-nine".