12739977 has 24 divisors (see below), whose sum is σ = 19542240. Its totient is φ = 8202600.

The previous prime is 12739973. The next prime is 12740003. The reversal of 12739977 is 77993721.

It is not a de Polignac number, because 12739977 - 2² = 12739973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12739973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25702 + ... + 26192.

It is an arithmetic number, because the mean of its divisors is an integer number (814260).

Almost surely, 2^12739977 is an apocalyptic number.

It is an amenable number.

12739977 is a deficient number, since it is larger than the sum of its proper divisors (6802263).

12739977 is an equidigital number, since it uses as much as digits as its factorization.

12739977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 525 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 12739977 is about 3569.3104376056. The cubic root of 12739977 is about 233.5552037018. Note that the first 3 decimals are identical.

It can be divided in two parts, 1273 and 9977, that multiplied together give a palindrome (12700721).

The spelling of 12739977 in words is "twelve million, seven hundred thirty-nine thousand, nine hundred seventy-seven".