728003 has 2 divisors, whose sum is σ = 728004. Its totient is φ = 728002.

The previous prime is 727997. The next prime is 728017. The reversal of 728003 is 300827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728003 - 2⁶ = 727939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728303) 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 as a sum of consecutive naturals, namely, 364001 + 364002.

It is an arithmetic number, because the mean of its divisors is an integer number (364002).

2⁷²⁸⁰⁰³ is an apocalyptic number.

728003 is a deficient number, since it is larger than the sum of its proper divisors (1).

728003 is an equidigital number, since it uses as much as digits as its factorization.

728003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 728003 is about 853.2309183334. The cubic root of 728003 is about 89.9589524752.

The spelling of 728003 in words is "seven hundred twenty-eight thousand, three".