12897993 has 16 divisors (see below), whose sum is σ = 17561600. Its totient is φ = 8418816.

The previous prime is 12897971. The next prime is 12898007. The reversal of 12897993 is 39979821.

12897993 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 not a de Polignac number, because 12897993 - 2⁵ = 12897961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12897293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36783 + ... + 37131.

It is an arithmetic number, because the mean of its divisors is an integer number (1097600).

Almost surely, 2^12897993 is an apocalyptic number.

It is an amenable number.

12897993 is a deficient number, since it is larger than the sum of its proper divisors (4663607).

12897993 is a wasteful number, since it uses less digits than its factorization.

12897993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its digits is 244944, while the sum is 48.

The square root of 12897993 is about 3591.3775908417. The cubic root of 12897993 is about 234.5168464733.

The spelling of 12897993 in words is "twelve million, eight hundred ninety-seven thousand, nine hundred ninety-three".