12813993 has 12 divisors (see below), whose sum is σ = 18644080. Its totient is φ = 8480376.

The previous prime is 12813989. The next prime is 12814019. The reversal of 12813993 is 39931821.

It is not a de Polignac number, because 12813993 - 2² = 12813989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12813973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3871 + ... + 6372.

Almost surely, 2^12813993 is an apocalyptic number.

It is an amenable number.

12813993 is a deficient number, since it is larger than the sum of its proper divisors (5830087).

12813993 is a wasteful number, since it uses less digits than its factorization.

12813993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388 (or 10385 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 12813993 is about 3579.6638110303. The cubic root of 12813993 is about 234.0066292227.

The spelling of 12813993 in words is "twelve million, eight hundred thirteen thousand, nine hundred ninety-three".