12917789 has 16 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 11753280.

The previous prime is 12917783. The next prime is 12917791. The reversal of 12917789 is 98771921.

It is a cyclic number.

It is not a de Polignac number, because 12917789 - 2¹⁶ = 12852253 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 (12917783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71279 + ... + 71459.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^12917789 is an apocalyptic number.

It is an amenable number.

12917789 is a deficient number, since it is larger than the sum of its proper divisors (1234531).

12917789 is a wasteful number, since it uses less digits than its factorization.

12917789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its digits is 63504, while the sum is 44.

The square root of 12917789 is about 3594.1325796359. The cubic root of 12917789 is about 234.6367649339.

The spelling of 12917789 in words is "twelve million, nine hundred seventeen thousand, seven hundred eighty-nine".