12980639 has 12 divisors (see below), whose sum is σ = 15989184. Its totient is φ = 10471104.

The previous prime is 12980633. The next prime is 12980677. The reversal of 12980639 is 93608921.

12980639 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12980639 - 2⁴ = 12980623 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 (12980633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6959 + ... + 8624.

It is an arithmetic number, because the mean of its divisors is an integer number (1332432).

Almost surely, 2^12980639 is an apocalyptic number.

12980639 is a deficient number, since it is larger than the sum of its proper divisors (3008545).

12980639 is a wasteful number, since it uses less digits than its factorization.

12980639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15614 (or 15607 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 12980639 is about 3602.8653874382. The cubic root of 12980639 is about 235.0166820812.

The spelling of 12980639 in words is "twelve million, nine hundred eighty thousand, six hundred thirty-nine".