12977839 has 4 divisors (see below), whose sum is σ = 14831824. Its totient is φ = 11123856.

The previous prime is 12977837. The next prime is 12977843. The reversal of 12977839 is 93877921.

It is a happy number.

12977839 is digitally balanced in base 2 and base 8, because in such bases 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 12977839 - 2¹ = 12977837 is a prime.

12977839 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12977831) 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, 926982 + ... + 926995.

It is an arithmetic number, because the mean of its divisors is an integer number (3707956).

Almost surely, 2^12977839 is an apocalyptic number.

12977839 is a deficient number, since it is larger than the sum of its proper divisors (1853985).

12977839 is an equidigital number, since it uses as much as digits as its factorization.

12977839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853984.

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

The square root of 12977839 is about 3602.4767868787. The cubic root of 12977839 is about 234.9997827069. Note that the first 3 decimals are identical.

The spelling of 12977839 in words is "twelve million, nine hundred seventy-seven thousand, eight hundred thirty-nine".