12977239 has 16 divisors (see below), whose sum is σ = 15513120. Its totient is φ = 10716160.

The previous prime is 12977233. The next prime is 12977243. The reversal of 12977239 is 93277921.

It is a cyclic number.

It is not a de Polignac number, because 12977239 - 2⁵ = 12977207 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 (12977233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4227 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (969570).

Almost surely, 2^12977239 is an apocalyptic number.

12977239 is a deficient number, since it is larger than the sum of its proper divisors (2535881).

12977239 is a wasteful number, since it uses less digits than its factorization.

12977239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450.

The product of its digits is 47628, while the sum is 40.

The square root of 12977239 is about 3602.3935098765. The cubic root of 12977239 is about 234.9961610962.

The spelling of 12977239 in words is "twelve million, nine hundred seventy-seven thousand, two hundred thirty-nine".