728369 has 2 divisors, whose sum is σ = 728370. Its totient is φ = 728368.

The previous prime is 728333. The next prime is 728381. The reversal of 728369 is 963827.

728369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 255025 = 688^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 728369 - 2⁸ = 728113 is a prime.

It is a super-2 number, since 2×728369² = 1061042800322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (728069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364184 + 364185.

It is an arithmetic number, because the mean of its divisors is an integer number (364185).

2⁷²⁸³⁶⁹ is an apocalyptic number.

It is an amenable number.

728369 is a deficient number, since it is larger than the sum of its proper divisors (1).

728369 is an equidigital number, since it uses as much as digits as its factorization.

728369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 728369 is about 853.4453702493. The cubic root of 728369 is about 89.9740254261.

The spelling of 728369 in words is "seven hundred twenty-eight thousand, three hundred sixty-nine".