729013 has 4 divisors (see below), whose sum is σ = 730828. Its totient is φ = 727200.

The previous prime is 728993. The next prime is 729019. The reversal of 729013 is 310927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289444 + 439569 = 538^2 + 663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (182707).

729013 is a Friedman number, since it can be written as 90^3+7*2-1, using all its digits and the basic arithmetic operations.

2⁷²⁹⁰¹³ is an apocalyptic number.

It is an amenable number.

729013 is a deficient number, since it is larger than the sum of its proper divisors (1815).

729013 is a wasteful number, since it uses less digits than its factorization.

729013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 729013 is about 853.8225811022. The cubic root of 729013 is about 90.0005349762. Note that the first 3 decimals are identical.

The spelling of 729013 in words is "seven hundred twenty-nine thousand, thirteen".