725202209 has 2 divisors, whose sum is σ = 725202210. Its totient is φ = 725202208.

The previous prime is 725202173. The next prime is 725202223. The reversal of 725202209 is 902202527.

725202209 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., 589129984 + 136072225 = 24272^2 + 11665^2 .

It is an emirp because it is prime and its reverse (902202527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 725202209 - 2¹⁶ = 725136673 is a prime.

It is not a weakly prime, because it can be changed into another prime (725202229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362601104 + 362601105.

It is an arithmetic number, because the mean of its divisors is an integer number (362601105).

Almost surely, 2^725202209 is an apocalyptic number.

It is an amenable number.

725202209 is a deficient number, since it is larger than the sum of its proper divisors (1).

725202209 is an equidigital number, since it uses as much as digits as its factorization.

725202209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 725202209 is about 26929.5787007521. The cubic root of 725202209 is about 898.4344011804.

The spelling of 725202209 in words is "seven hundred twenty-five million, two hundred two thousand, two hundred nine".