12693643 has 4 divisors (see below), whose sum is σ = 12988888. Its totient is φ = 12398400.

The previous prime is 12693599. The next prime is 12693647. The reversal of 12693643 is 34639621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34639621 = 103 ⋅336307.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12693643 is a prime.

It is a super-2 number, since 2×12693643² = 322257145222898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12693599 and 12693608.

It is not an unprimeable number, because it can be changed into a prime (12693647) 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, 147558 + ... + 147643.

It is an arithmetic number, because the mean of its divisors is an integer number (3247222).

Almost surely, 2^12693643 is an apocalyptic number.

12693643 is a deficient number, since it is larger than the sum of its proper divisors (295245).

12693643 is an equidigital number, since it uses as much as digits as its factorization.

12693643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295244.

The product of its digits is 23328, while the sum is 34.

The square root of 12693643 is about 3562.8139159939. The cubic root of 12693643 is about 233.2717209207.

The spelling of 12693643 in words is "twelve million, six hundred ninety-three thousand, six hundred forty-three".