722036209 has 2 divisors, whose sum is σ = 722036210. Its totient is φ = 722036208.

The previous prime is 722036201. The next prime is 722036243. The reversal of 722036209 is 902630227.

722036209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705061809 + 16974400 = 26553^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 722036209 - 2³ = 722036201 is a prime.

It is not a weakly prime, because it can be changed into another prime (722036201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361018104 + 361018105.

It is an arithmetic number, because the mean of its divisors is an integer number (361018105).

Almost surely, 2^722036209 is an apocalyptic number.

It is an amenable number.

722036209 is a deficient number, since it is larger than the sum of its proper divisors (1).

722036209 is an equidigital number, since it uses as much as digits as its factorization.

722036209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 722036209 is about 26870.7314563634. The cubic root of 722036209 is about 897.1250685758.

The spelling of 722036209 in words is "seven hundred twenty-two million, thirty-six thousand, two hundred nine".