12789317 has 4 divisors (see below), whose sum is σ = 12800076. Its totient is φ = 12778560.

The previous prime is 12789307. The next prime is 12789323. The reversal of 12789317 is 71398721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71398721 = 409 ⋅174569.

It can be written as a sum of positive squares in 2 ways, for example, as 776161 + 12013156 = 881^2 + 3466^2 .

It is a cyclic number.

It is not a de Polignac number, because 12789317 - 2⁸ = 12789061 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 (12789307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3338 + ... + 6059.

It is an arithmetic number, because the mean of its divisors is an integer number (3200019).

Almost surely, 2^12789317 is an apocalyptic number.

It is an amenable number.

12789317 is a deficient number, since it is larger than the sum of its proper divisors (10759).

12789317 is an equidigital number, since it uses as much as digits as its factorization.

12789317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10758.

The product of its digits is 21168, while the sum is 38.

The square root of 12789317 is about 3576.2154577150. The cubic root of 12789317 is about 233.8563232740.

The spelling of 12789317 in words is "twelve million, seven hundred eighty-nine thousand, three hundred seventeen".