12899729 has 4 divisors (see below), whose sum is σ = 12956784. Its totient is φ = 12842676.

The previous prime is 12899713. The next prime is 12899737. The reversal of 12899729 is 92799821.

It is a happy number.

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 12899729 - 2⁴ = 12899713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12899759) 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, 28187 + ... + 28640.

It is an arithmetic number, because the mean of its divisors is an integer number (3239196).

Almost surely, 2^12899729 is an apocalyptic number.

It is an amenable number.

12899729 is a deficient number, since it is larger than the sum of its proper divisors (57055).

12899729 is an equidigital number, since it uses as much as digits as its factorization.

12899729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57054.

The product of its digits is 163296, while the sum is 47.

The square root of 12899729 is about 3591.6192726958. The cubic root of 12899729 is about 234.5273675671.

The spelling of 12899729 in words is "twelve million, eight hundred ninety-nine thousand, seven hundred twenty-nine".