12993437 has 4 divisors (see below), whose sum is σ = 13001820. Its totient is φ = 12985056.

The previous prime is 12993419. The next prime is 12993451. The reversal of 12993437 is 73439921.

12993437 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 4618201 = 2894^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 12993437 - 2⁶ = 12993373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12993437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12993037) 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, 1112 + ... + 5217.

It is an arithmetic number, because the mean of its divisors is an integer number (3250455).

Almost surely, 2^12993437 is an apocalyptic number.

It is an amenable number.

12993437 is a deficient number, since it is larger than the sum of its proper divisors (8383).

12993437 is an equidigital number, since it uses as much as digits as its factorization.

12993437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382.

The product of its digits is 40824, while the sum is 38.

The square root of 12993437 is about 3604.6410362198. The cubic root of 12993437 is about 235.0938933690.

The spelling of 12993437 in words is "twelve million, nine hundred ninety-three thousand, four hundred thirty-seven".