728743 has 2 divisors, whose sum is σ = 728744. Its totient is φ = 728742.

The previous prime is 728731. The next prime is 728747. The reversal of 728743 is 347827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728743 - 2¹⁷ = 597671 is a prime.

It is a d-powerful number, because it can be written as 7³ + 2¹⁷ + 7³ + 8 + 4⁸ + 3¹² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364371 + 364372.

It is an arithmetic number, because the mean of its divisors is an integer number (364372).

2⁷²⁸⁷⁴³ is an apocalyptic number.

728743 is a deficient number, since it is larger than the sum of its proper divisors (1).

728743 is an equidigital number, since it uses as much as digits as its factorization.

728743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 728743 is about 853.6644539865. The cubic root of 728743 is about 89.9894226252.

The spelling of 728743 in words is "seven hundred twenty-eight thousand, seven hundred forty-three".