728663833 has 2 divisors, whose sum is σ = 728663834. Its totient is φ = 728663832.

The previous prime is 728663821. The next prime is 728663857. The reversal of 728663833 is 338366827.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 488940544 + 239723289 = 22112^2 + 15483^2 .

It is a cyclic number.

It is not a de Polignac number, because 728663833 - 2²¹ = 726566681 is a prime.

It is not a weakly prime, because it can be changed into another prime (728663863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364331916 + 364331917.

It is an arithmetic number, because the mean of its divisors is an integer number (364331917).

Almost surely, 2^728663833 is an apocalyptic number.

It is an amenable number.

728663833 is a deficient number, since it is larger than the sum of its proper divisors (1).

728663833 is an equidigital number, since it uses as much as digits as its factorization.

728663833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 728663833 is about 26993.7739673429. The cubic root of 728663833 is about 899.8616384008.

The spelling of 728663833 in words is "seven hundred twenty-eight million, six hundred sixty-three thousand, eight hundred thirty-three".