12703729 has 8 divisors (see below), whose sum is σ = 13004712. Its totient is φ = 12405120.

The previous prime is 12703699. The next prime is 12703739. The reversal of 12703729 is 92730721.

It can be written as a sum of positive squares in 4 ways, for example, as 1299600 + 11404129 = 1140^2 + 3377^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12703729 - 2⁵ = 12703697 is a prime.

It is a super-2 number, since 2×12703729² = 322769461010882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12703729.

It is not an unprimeable number, because it can be changed into a prime (12703739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14467 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (1625589).

Almost surely, 2^12703729 is an apocalyptic number.

It is an amenable number.

12703729 is a deficient number, since it is larger than the sum of its proper divisors (300983).

12703729 is an equidigital number, since it uses as much as digits as its factorization.

12703729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 12703729 is about 3564.2290891580. The cubic root of 12703729 is about 233.3334882085. Note that the first 3 decimals are identical.

The spelling of 12703729 in words is "twelve million, seven hundred three thousand, seven hundred twenty-nine".