729399 has 24 divisors (see below), whose sum is σ = 1143936. Its totient is φ = 409200.

The previous prime is 729389. The next prime is 729403. The reversal of 729399 is 993927.

729399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 729399 - 2⁵ = 729367 is a prime.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23514 + ... + 23544.

It is an arithmetic number, because the mean of its divisors is an integer number (47664).

2⁷²⁹³⁹⁹ is an apocalyptic number.

729399 is a deficient number, since it is larger than the sum of its proper divisors (414537).

729399 is a wasteful number, since it uses less digits than its factorization.

729399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 68 counting only the distinct ones).

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

The square root of 729399 is about 854.0485934653. The cubic root of 729399 is about 90.0164167583.

It can be divided in two parts, 729 and 399, that added together give a triangular number (1128 = T₄₇).

The spelling of 729399 in words is "seven hundred twenty-nine thousand, three hundred ninety-nine".