12817969 has 4 divisors (see below), whose sum is σ = 13375296. Its totient is φ = 12260644.

The previous prime is 12817967. The next prime is 12817979. The reversal of 12817969 is 96971821.

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 12817969 - 2¹ = 12817967 is a prime.

It is a super-2 number, since 2×12817969² = 328600658569922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278629 + ... + 278674.

It is an arithmetic number, because the mean of its divisors is an integer number (3343824).

Almost surely, 2^12817969 is an apocalyptic number.

It is an amenable number.

12817969 is a deficient number, since it is larger than the sum of its proper divisors (557327).

12817969 is an equidigital number, since it uses as much as digits as its factorization.

12817969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557326.

The product of its digits is 54432, while the sum is 43.

The square root of 12817969 is about 3580.2191273720. The cubic root of 12817969 is about 234.0308296974.

It can be divided in two parts, 128 and 17969, that multiplied together give a palindrome (2300032).

The spelling of 12817969 in words is "twelve million, eight hundred seventeen thousand, nine hundred sixty-nine".