12693809 has 4 divisors (see below), whose sum is σ = 12707904. Its totient is φ = 12679716.

The previous prime is 12693797. The next prime is 12693817. The reversal of 12693809 is 90839621.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12693809 is a prime.

It is a super-2 number, since 2×12693809² = 322265573856962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12693839) 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, 5597 + ... + 7530.

It is an arithmetic number, because the mean of its divisors is an integer number (3176976).

Almost surely, 2^12693809 is an apocalyptic number.

It is an amenable number.

12693809 is a deficient number, since it is larger than the sum of its proper divisors (14095).

12693809 is an equidigital number, since it uses as much as digits as its factorization.

12693809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14094.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 12693809 is about 3562.8372121106. The cubic root of 12693809 is about 233.2727377797.

The spelling of 12693809 in words is "twelve million, six hundred ninety-three thousand, eight hundred nine".