12991683 has 6 divisors (see below), whose sum is σ = 17330572. Its totient is φ = 8656960.

The previous prime is 12991679. The next prime is 12991703. The reversal of 12991683 is 38619921.

12991683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12991683 - 2² = 12991679 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (12991603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5203 + ... + 7283.

Almost surely, 2^12991683 is an apocalyptic number.

12991683 is a deficient number, since it is larger than the sum of its proper divisors (4338889).

12991683 is an frugal number, since it uses more digits than its factorization.

12991683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165 (or 2084 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 12991683 is about 3604.3977305508. The cubic root of 12991683 is about 235.0833143553.

The spelling of 12991683 in words is "twelve million, nine hundred ninety-one thousand, six hundred eighty-three".