12976639 has 16 divisors (see below), whose sum is σ = 14878080. Its totient is φ = 11219040.

The previous prime is 12976567. The next prime is 12976643. The reversal of 12976639 is 93667921.

It is a cyclic number.

It is not a de Polignac number, because 12976639 - 2⁷ = 12976511 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 12976595 and 12976604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12976039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26184 + ... + 26674.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

Almost surely, 2^12976639 is an apocalyptic number.

12976639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12976639 is a deficient number, since it is larger than the sum of its proper divisors (1901441).

12976639 is a wasteful number, since it uses less digits than its factorization.

12976639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its digits is 122472, while the sum is 43.

The square root of 12976639 is about 3602.3102309490. The cubic root of 12976639 is about 234.9925393738.

The spelling of 12976639 in words is "twelve million, nine hundred seventy-six thousand, six hundred thirty-nine".