12687893 has 4 divisors (see below), whose sum is σ = 12698508. Its totient is φ = 12677280.

The previous prime is 12687889. The next prime is 12687943. The reversal of 12687893 is 39878621.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 142129 = 3542^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 12687893 - 2² = 12687889 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 (12687803) 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, 3248 + ... + 5993.

It is an arithmetic number, because the mean of its divisors is an integer number (3174627).

Almost surely, 2^12687893 is an apocalyptic number.

It is an amenable number.

12687893 is a deficient number, since it is larger than the sum of its proper divisors (10615).

12687893 is an equidigital number, since it uses as much as digits as its factorization.

12687893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10614.

The product of its digits is 145152, while the sum is 44.

The square root of 12687893 is about 3562.0068781517. The cubic root of 12687893 is about 233.2364929204.

The spelling of 12687893 in words is "twelve million, six hundred eighty-seven thousand, eight hundred ninety-three".