12817893 has 12 divisors (see below), whose sum is σ = 18785984. Its totient is φ = 7768200.

The previous prime is 12817867. The next prime is 12817897. The reversal of 12817893 is 39871821.

12817893 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12817893 - 2¹³ = 12809701 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 (12817897) 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 11 ways as a sum of consecutive naturals, for example, 17293 + ... + 18018.

Almost surely, 2^12817893 is an apocalyptic number.

It is an amenable number.

12817893 is a deficient number, since it is larger than the sum of its proper divisors (5968091).

12817893 is a wasteful number, since it uses less digits than its factorization.

12817893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35336 (or 35325 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 12817893 is about 3580.2085134807. The cubic root of 12817893 is about 234.0303671598.

It can be divided in two parts, 128178 and 93, that added together give a triangular number (128271 = T₅₀₆).

The spelling of 12817893 in words is "twelve million, eight hundred seventeen thousand, eight hundred ninety-three".