729939 has 8 divisors (see below), whose sum is σ = 1112320. Its totient is φ = 417096.

The previous prime is 729931. The next prime is 729941. The reversal of 729939 is 939927.

729939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 729939 - 2³ = 729931 is a prime.

It is a Duffinian number.

729939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 729897 and 729906.

It is not an unprimeable number, because it can be changed into a prime (729931) 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, 17359 + ... + 17400.

It is an arithmetic number, because the mean of its divisors is an integer number (139040).

2⁷²⁹⁹³⁹ is an apocalyptic number.

729939 is a deficient number, since it is larger than the sum of its proper divisors (382381).

729939 is a wasteful number, since it uses less digits than its factorization.

729939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34769.

The product of its digits is 30618, while the sum is 39.

The square root of 729939 is about 854.3646762361. The cubic root of 729939 is about 90.0386253960.

It can be divided in two parts, 72 and 9939, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 729939 in words is "seven hundred twenty-nine thousand, nine hundred thirty-nine".