12963691 has 4 divisors (see below), whose sum is σ = 13960912. Its totient is φ = 11966472.

The previous prime is 12963679. The next prime is 12963701. The reversal of 12963691 is 19636921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12963691 - 2⁷ = 12963563 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 12963691.

It is not an unprimeable number, because it can be changed into a prime (12963091) 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, 498591 + ... + 498616.

It is an arithmetic number, because the mean of its divisors is an integer number (3490228).

Almost surely, 2^12963691 is an apocalyptic number.

12963691 is a deficient number, since it is larger than the sum of its proper divisors (997221).

12963691 is an equidigital number, since it uses as much as digits as its factorization.

12963691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997220.

The product of its digits is 17496, while the sum is 37.

The square root of 12963691 is about 3600.5126023943. The cubic root of 12963691 is about 234.9143553913.

It can be divided in two parts, 1 and 2963691, that added together give a palindrome (2963692).

The spelling of 12963691 in words is "twelve million, nine hundred sixty-three thousand, six hundred ninety-one".