728730913 has 2 divisors, whose sum is σ = 728730914. Its totient is φ = 728730912.

The previous prime is 728730887. The next prime is 728730917. The reversal of 728730913 is 319037827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580183569 + 148547344 = 24087^2 + 12188^2 .

It is a cyclic number.

It is not a de Polignac number, because 728730913 - 2¹³ = 728722721 is a prime.

It is not a weakly prime, because it can be changed into another prime (728730917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364365456 + 364365457.

It is an arithmetic number, because the mean of its divisors is an integer number (364365457).

Almost surely, 2^728730913 is an apocalyptic number.

It is an amenable number.

728730913 is a deficient number, since it is larger than the sum of its proper divisors (1).

728730913 is an equidigital number, since it uses as much as digits as its factorization.

728730913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 728730913 is about 26995.0164474853. The cubic root of 728730913 is about 899.8892509815.

The spelling of 728730913 in words is "seven hundred twenty-eight million, seven hundred thirty thousand, nine hundred thirteen".