729873 has 6 divisors (see below), whose sum is σ = 1054274. Its totient is φ = 486576.

The previous prime is 729871. The next prime is 729877. The reversal of 729873 is 378927.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 3969 = 852^2 + 63^2 .

It is not a de Polignac number, because 729873 - 2¹ = 729871 is a prime.

It is a super-2 number, since 2×729873² = 1065429192258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729871) 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, 40540 + ... + 40557.

2⁷²⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

729873 is a deficient number, since it is larger than the sum of its proper divisors (324401).

729873 is a wasteful number, since it uses less digits than its factorization.

729873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81103 (or 81100 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 729873 is about 854.3260501705. The cubic root of 729873 is about 90.0359115947.

The spelling of 729873 in words is "seven hundred twenty-nine thousand, eight hundred seventy-three".