12993543 has 6 divisors (see below), whose sum is σ = 18768464. Its totient is φ = 8662356.

The previous prime is 12993509. The next prime is 12993571. The reversal of 12993543 is 34539921.

It is a happy number.

12993543 is a `hidden beast` number, since 1 + 29 + 93 + 543 = 666.

It is not a de Polignac number, because 12993543 - 2¹⁰ = 12992519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12993498 and 12993507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12991543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721855 + ... + 721872.

Almost surely, 2^12993543 is an apocalyptic number.

12993543 is a deficient number, since it is larger than the sum of its proper divisors (5774921).

12993543 is a wasteful number, since it uses less digits than its factorization.

12993543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443733 (or 1443730 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 12993543 is about 3604.6557394570. The cubic root of 12993543 is about 235.0945326632.

The spelling of 12993543 in words is "twelve million, nine hundred ninety-three thousand, five hundred forty-three".