729819 has 12 divisors (see below), whose sum is σ = 1067976. Its totient is φ = 480192.

The previous prime is 729791. The next prime is 729821. The reversal of 729819 is 918927.

It is a happy number.

It is not a de Polignac number, because 729819 - 2⁵ = 729787 is a prime.

It is a super-2 number, since 2×729819² = 1065271545522, which contains 22 as substring.

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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259 + ... + 1235.

It is an arithmetic number, because the mean of its divisors is an integer number (88998).

2⁷²⁹⁸¹⁹ is an apocalyptic number.

729819 is a deficient number, since it is larger than the sum of its proper divisors (338157).

729819 is a wasteful number, since it uses less digits than its factorization.

729819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1063 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 729819 is about 854.2944457270. The cubic root of 729819 is about 90.0336910900.

The spelling of 729819 in words is "seven hundred twenty-nine thousand, eight hundred nineteen".