728293 has 2 divisors, whose sum is σ = 728294. Its totient is φ = 728292.

The previous prime is 728281. The next prime is 728303. The reversal of 728293 is 392827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 263169 = 682^2 + 513^2 .

It is an emirp because it is prime and its reverse (392827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728293 - 2⁵ = 728261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728993) 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, 364146 + 364147.

It is an arithmetic number, because the mean of its divisors is an integer number (364147).

2⁷²⁸²⁹³ is an apocalyptic number.

It is an amenable number.

728293 is a deficient number, since it is larger than the sum of its proper divisors (1).

728293 is an equidigital number, since it uses as much as digits as its factorization.

728293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 728293 is about 853.4008436837. The cubic root of 728293 is about 89.9708959392.

The spelling of 728293 in words is "seven hundred twenty-eight thousand, two hundred ninety-three".