12663729 has 32 divisors (see below), whose sum is σ = 20451200. Its totient is φ = 7698240.

The previous prime is 12663697. The next prime is 12663733. The reversal of 12663729 is 92736621.

12663729 is a `hidden beast` number, since 12 + 6 + 637 + 2 + 9 = 666.

12663729 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 12663729 - 2⁵ = 12663697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12663693 and 12663702.

It is not an unprimeable number, because it can be changed into a prime (12663769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38094 + ... + 38424.

It is an arithmetic number, because the mean of its divisors is an integer number (639100).

Almost surely, 2^12663729 is an apocalyptic number.

It is an amenable number.

12663729 is a deficient number, since it is larger than the sum of its proper divisors (7787471).

12663729 is a wasteful number, since it uses less digits than its factorization.

12663729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 12663729 is about 3558.6133535410. The cubic root of 12663729 is about 233.0883330890.

The spelling of 12663729 in words is "twelve million, six hundred sixty-three thousand, seven hundred twenty-nine".