729389 has 2 divisors, whose sum is σ = 729390. Its totient is φ = 729388.

The previous prime is 729373. The next prime is 729403. The reversal of 729389 is 983927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 6889 = 850^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 729389 - 2⁴ = 729373 is a prime.

It is a plaindrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364694 + 364695.

It is an arithmetic number, because the mean of its divisors is an integer number (364695).

2⁷²⁹³⁸⁹ is an apocalyptic number.

It is an amenable number.

729389 is a deficient number, since it is larger than the sum of its proper divisors (1).

729389 is an equidigital number, since it uses as much as digits as its factorization.

729389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 729389 is about 854.0427389774. The cubic root of 729389 is about 90.0160053839.

The spelling of 729389 in words is "seven hundred twenty-nine thousand, three hundred eighty-nine".