12638969 has 8 divisors (see below), whose sum is σ = 14467008. Its totient is φ = 10816560.

The previous prime is 12638957. The next prime is 12638987. The reversal of 12638969 is 96983621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12638969 - 2⁴ = 12638953 is a prime.

It is a super-2 number, since 2×12638969² = 319487074765922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12638909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6074 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1808376).

Almost surely, 2^12638969 is an apocalyptic number.

It is an amenable number.

12638969 is a deficient number, since it is larger than the sum of its proper divisors (1828039).

12638969 is an equidigital number, since it uses as much as digits as its factorization.

12638969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815.

The product of its digits is 139968, while the sum is 44.

The square root of 12638969 is about 3555.1327682662. The cubic root of 12638969 is about 232.9363232945.

The spelling of 12638969 in words is "twelve million, six hundred thirty-eight thousand, nine hundred sixty-nine".