12538693 has 4 divisors (see below), whose sum is σ = 12546688. Its totient is φ = 12530700.

The previous prime is 12538679. The next prime is 12538723. The reversal of 12538693 is 39683521.

12538693 is digitally balanced in base 3, because in such base 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 Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 39683521 = 109 ⋅364069.

It is a cyclic number.

It is not a de Polignac number, because 12538693 - 2⁹ = 12538181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538633) 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, 783 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (3136672).

Almost surely, 2^12538693 is an apocalyptic number.

It is an amenable number.

12538693 is a deficient number, since it is larger than the sum of its proper divisors (7995).

12538693 is an equidigital number, since it uses as much as digits as its factorization.

12538693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7994.

The product of its digits is 38880, while the sum is 37.

The square root of 12538693 is about 3541.0016944362. The cubic root of 12538693 is about 232.3186576862.

It can be divided in two parts, 12538 and 693, that added together give a palindrome (13231).

The spelling of 12538693 in words is "twelve million, five hundred thirty-eight thousand, six hundred ninety-three".