722811697 has 2 divisors, whose sum is σ = 722811698. Its totient is φ = 722811696.

The previous prime is 722811679. The next prime is 722811701. The reversal of 722811697 is 796118227.

722811697 is nontrivially palindromic in base 11.

722811697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (722811679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659513761 + 63297936 = 25681^2 + 7956^2 .

It is an emirp because it is prime and its reverse (796118227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722811697 - 2¹⁵ = 722778929 is a prime.

It is not a weakly prime, because it can be changed into another prime (722811497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361405848 + 361405849.

It is an arithmetic number, because the mean of its divisors is an integer number (361405849).

Almost surely, 2^722811697 is an apocalyptic number.

It is an amenable number.

722811697 is a deficient number, since it is larger than the sum of its proper divisors (1).

722811697 is an equidigital number, since it uses as much as digits as its factorization.

722811697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 722811697 is about 26885.1575595160. The cubic root of 722811697 is about 897.4461331771.

The spelling of 722811697 in words is "seven hundred twenty-two million, eight hundred eleven thousand, six hundred ninety-seven".