652823209 has 2 divisors, whose sum is σ = 652823210. Its totient is φ = 652823208.

The previous prime is 652823179. The next prime is 652823231. The reversal of 652823209 is 902328256.

652823209 is nontrivially palindromic in base 12.

652823209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622352809 + 30470400 = 24947^2 + 5520^2 .

It is a cyclic number.

It is not a de Polignac number, because 652823209 - 2⁵ = 652823177 is a prime.

It is not a weakly prime, because it can be changed into another prime (652829209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326411604 + 326411605.

It is an arithmetic number, because the mean of its divisors is an integer number (326411605).

Almost surely, 2^652823209 is an apocalyptic number.

It is an amenable number.

652823209 is a deficient number, since it is larger than the sum of its proper divisors (1).

652823209 is an equidigital number, since it uses as much as digits as its factorization.

652823209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 652823209 is about 25550.4052609738. The cubic root of 652823209 is about 867.4914344981.

The spelling of 652823209 in words is "six hundred fifty-two million, eight hundred twenty-three thousand, two hundred nine".