728923253 has 2 divisors, whose sum is σ = 728923254. Its totient is φ = 728923252.

The previous prime is 728923193. The next prime is 728923267. The reversal of 728923253 is 352329827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616181329 + 112741924 = 24823^2 + 10618^2 .

It is an emirp because it is prime and its reverse (352329827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728923253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728923253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728920253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364461626 + 364461627.

It is an arithmetic number, because the mean of its divisors is an integer number (364461627).

Almost surely, 2^728923253 is an apocalyptic number.

It is an amenable number.

728923253 is a deficient number, since it is larger than the sum of its proper divisors (1).

728923253 is an equidigital number, since it uses as much as digits as its factorization.

728923253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 728923253 is about 26998.5787218513. The cubic root of 728923253 is about 899.9684157640.

The spelling of 728923253 in words is "seven hundred twenty-eight million, nine hundred twenty-three thousand, two hundred fifty-three".