12818693 has 4 divisors (see below), whose sum is σ = 12825888. Its totient is φ = 12811500.

The previous prime is 12818677. The next prime is 12818699. The reversal of 12818693 is 39681821.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12818693 - 2⁴ = 12818677 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 (12818699) 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, 1280 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (3206472).

Almost surely, 2^12818693 is an apocalyptic number.

It is an amenable number.

12818693 is a deficient number, since it is larger than the sum of its proper divisors (7195).

12818693 is an equidigital number, since it uses as much as digits as its factorization.

12818693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194.

The product of its digits is 20736, while the sum is 38.

The square root of 12818693 is about 3580.3202370738. The cubic root of 12818693 is about 234.0352358851.

The spelling of 12818693 in words is "twelve million, eight hundred eighteen thousand, six hundred ninety-three".