12678986 has 4 divisors (see below), whose sum is σ = 19018482. Its totient is φ = 6339492.

The previous prime is 12678983. The next prime is 12679019. The reversal of 12678986 is 68987621.

12678986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 323761 = 3515^2 + 569^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12678986.

It is not an unprimeable number, because it can be changed into a prime (12678983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3169745 + ... + 3169748.

Almost surely, 2^12678986 is an apocalyptic number.

12678986 is a deficient number, since it is larger than the sum of its proper divisors (6339496).

12678986 is an equidigital number, since it uses as much as digits as its factorization.

12678986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6339495.

The product of its digits is 290304, while the sum is 47.

The square root of 12678986 is about 3560.7563803215. The cubic root of 12678986 is about 233.1819021974.

The spelling of 12678986 in words is "twelve million, six hundred seventy-eight thousand, nine hundred eighty-six".