12663969 has 4 divisors (see below), whose sum is σ = 16885296. Its totient is φ = 8442644.

The previous prime is 12663949. The next prime is 12663971. The reversal of 12663969 is 96936621.

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.

It is a cyclic number.

It is not a de Polignac number, because 12663969 - 2¹³ = 12655777 is a prime.

It is a super-2 number, since 2×12663969² = 320752221665922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12663969.

It is not an unprimeable number, because it can be changed into a prime (12663919) 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, 2110659 + ... + 2110664.

It is an arithmetic number, because the mean of its divisors is an integer number (4221324).

Almost surely, 2^12663969 is an apocalyptic number.

It is an amenable number.

12663969 is a deficient number, since it is larger than the sum of its proper divisors (4221327).

12663969 is an equidigital number, since it uses as much as digits as its factorization.

12663969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221326.

The product of its digits is 104976, while the sum is 42.

The square root of 12663969 is about 3558.6470743809. The cubic root of 12663969 is about 233.0898055580.

The spelling of 12663969 in words is "twelve million, six hundred sixty-three thousand, nine hundred sixty-nine".