729349 has 4 divisors (see below), whose sum is σ = 747180. Its totient is φ = 711520.

The previous prime is 729331. The next prime is 729359. The reversal of 729349 is 943927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943927 = 883 ⋅1069.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 338724 = 625^2 + 582^2 .

It is a cyclic number.

It is not a de Polignac number, because 729349 - 2⁹ = 728837 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 (729329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8854 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (186795).

2⁷²⁹³⁴⁹ is an apocalyptic number.

It is an amenable number.

729349 is a deficient number, since it is larger than the sum of its proper divisors (17831).

729349 is a wasteful number, since it uses less digits than its factorization.

729349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830.

The product of its digits is 13608, while the sum is 34.

The square root of 729349 is about 854.0193206245. The cubic root of 729349 is about 90.0143598486.

The spelling of 729349 in words is "seven hundred twenty-nine thousand, three hundred forty-nine".