728530001 has 2 divisors, whose sum is σ = 728530002. Its totient is φ = 728530000.

The previous prime is 728529973. The next prime is 728530003. The reversal of 728530001 is 100035827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667705600 + 60824401 = 25840^2 + 7799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728530001 is a prime.

Together with 728530003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728530003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364265000 + 364265001.

It is an arithmetic number, because the mean of its divisors is an integer number (364265001).

Almost surely, 2^728530001 is an apocalyptic number.

It is an amenable number.

728530001 is a deficient number, since it is larger than the sum of its proper divisors (1).

728530001 is an equidigital number, since it uses as much as digits as its factorization.

728530001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 728530001 is about 26991.2949115080. The cubic root of 728530001 is about 899.8065431927.

Adding to 728530001 its reverse (100035827), we get a palindrome (828565828).

The spelling of 728530001 in words is "seven hundred twenty-eight million, five hundred thirty thousand, one".