12983986 has 4 divisors (see below), whose sum is σ = 19475982. Its totient is φ = 6491992.

The previous prime is 12983977. The next prime is 12983987. The reversal of 12983986 is 68938921.

12983986 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., 12383361 + 600625 = 3519^2 + 775^2 .

It is not an unprimeable number, because it can be changed into a prime (12983987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245995 + ... + 3245998.

Almost surely, 2^12983986 is an apocalyptic number.

12983986 is a deficient number, since it is larger than the sum of its proper divisors (6491996).

12983986 is an equidigital number, since it uses as much as digits as its factorization.

12983986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491995.

The product of its digits is 186624, while the sum is 46.

The square root of 12983986 is about 3603.3298489036. The cubic root of 12983986 is about 235.0368796805.

The spelling of 12983986 in words is "twelve million, nine hundred eighty-three thousand, nine hundred eighty-six".