652728709 has 2 divisors, whose sum is σ = 652728710. Its totient is φ = 652728708.

The previous prime is 652728689. The next prime is 652728721. The reversal of 652728709 is 907827256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 604078084 + 48650625 = 24578^2 + 6975^2 .

It is a cyclic number.

It is not a de Polignac number, because 652728709 - 2²¹ = 650631557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652728749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326364354 + 326364355.

It is an arithmetic number, because the mean of its divisors is an integer number (326364355).

Almost surely, 2^652728709 is an apocalyptic number.

It is an amenable number.

652728709 is a deficient number, since it is larger than the sum of its proper divisors (1).

652728709 is an equidigital number, since it uses as much as digits as its factorization.

652728709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 652728709 is about 25548.5559083092. Note that the first 3 decimals coincide. The cubic root of 652728709 is about 867.4495743154.

The spelling of 652728709 in words is "six hundred fifty-two million, seven hundred twenty-eight thousand, seven hundred nine".