12993986 has 8 divisors (see below), whose sum is σ = 20516880. Its totient is φ = 6155028.

The previous prime is 12993979. The next prime is 12993989. The reversal of 12993986 is 68939921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12993986.

It is not an unprimeable number, because it can be changed into a prime (12993989) 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, 170936 + ... + 171011.

It is an arithmetic number, because the mean of its divisors is an integer number (2564610).

Almost surely, 2^12993986 is an apocalyptic number.

12993986 is a deficient number, since it is larger than the sum of its proper divisors (7522894).

12993986 is a wasteful number, since it uses less digits than its factorization.

12993986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341968.

The product of its digits is 209952, while the sum is 47.

The square root of 12993986 is about 3604.7171872423. The cubic root of 12993986 is about 235.0972043927.

The spelling of 12993986 in words is "twelve million, nine hundred ninety-three thousand, nine hundred eighty-six".