12817793 has 4 divisors (see below), whose sum is σ = 13090560. Its totient is φ = 12545028.

The previous prime is 12817781. The next prime is 12817801. The reversal of 12817793 is 39771821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39771821 = 5647 ⋅7043.

It is a cyclic number.

It is not a de Polignac number, because 12817793 - 2¹⁸ = 12555649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817733) 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, 136313 + ... + 136406.

It is an arithmetic number, because the mean of its divisors is an integer number (3272640).

Almost surely, 2^12817793 is an apocalyptic number.

It is an amenable number.

12817793 is a deficient number, since it is larger than the sum of its proper divisors (272767).

12817793 is an equidigital number, since it uses as much as digits as its factorization.

12817793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272766.

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

The square root of 12817793 is about 3580.1945477865. The cubic root of 12817793 is about 234.0297585549.

The spelling of 12817793 in words is "twelve million, eight hundred seventeen thousand, seven hundred ninety-three".