12693988 has 6 divisors (see below), whose sum is σ = 22214486. Its totient is φ = 6346992.

The previous prime is 12693959. The next prime is 12693991. The reversal of 12693988 is 88939621.

It can be written as a sum of positive squares in only one way, i.e., 12616704 + 77284 = 3552^2 + 278^2 .

It is a super-2 number, since 2×12693988² = 322274662688288, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1586745 + ... + 1586752.

Almost surely, 2^12693988 is an apocalyptic number.

It is an amenable number.

12693988 is a deficient number, since it is larger than the sum of its proper divisors (9520498).

12693988 is a wasteful number, since it uses less digits than its factorization.

12693988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173501 (or 3173499 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 12693988 is about 3562.8623324513. The cubic root of 12693988 is about 233.2738342624.

The spelling of 12693988 in words is "twelve million, six hundred ninety-three thousand, nine hundred eighty-eight".