728747 has 2 divisors, whose sum is σ = 728748. Its totient is φ = 728746.

The previous prime is 728743. The next prime is 728771. The reversal of 728747 is 747827.

It is a weak prime.

It is an emirp because it is prime and its reverse (747827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728747 - 2² = 728743 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364373 + 364374.

It is an arithmetic number, because the mean of its divisors is an integer number (364374).

2⁷²⁸⁷⁴⁷ is an apocalyptic number.

728747 is a deficient number, since it is larger than the sum of its proper divisors (1).

728747 is an equidigital number, since it uses as much as digits as its factorization.

728747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 35.

The square root of 728747 is about 853.6667968241. Note that the first 3 decimals coincide. The cubic root of 728747 is about 89.9895872727.

The spelling of 728747 in words is "seven hundred twenty-eight thousand, seven hundred forty-seven".