12689968 has 10 divisors (see below), whose sum is σ = 24586844. Its totient is φ = 6344976.

The previous prime is 12689923. The next prime is 12689969. The reversal of 12689968 is 86998621.

It is a happy number.

It is a super-2 number, since 2×12689968² = 322070575682048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 396546 + ... + 396577.

Almost surely, 2^12689968 is an apocalyptic number.

It is an amenable number.

12689968 is a deficient number, since it is larger than the sum of its proper divisors (11896876).

12689968 is an equidigital number, since it uses as much as digits as its factorization.

12689968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793131 (or 793125 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 12689968 is about 3562.2981346316. The cubic root of 12689968 is about 233.2492068607.

It can be divided in two parts, 1268 and 9968, that added together give a square (11236 = 106²).

The spelling of 12689968 in words is "twelve million, six hundred eighty-nine thousand, nine hundred sixty-eight".