722273917689 has 9 divisors (see below), whose sum is σ = 1043288230543. Its totient is φ = 481514245392.

The previous prime is 722273917681. The next prime is 722273917721. The reversal of 722273917689 is 986719372227.

The square root of 722273917689 is 849867.

It is a perfect power (a square), and thus also a powerful number.

722273917689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 114435388089 + 607838529600 = 338283^2 + 779640^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 722273917689 - 2³ = 722273917681 is a prime.

It is a super-2 number, since 2×722273917689² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722273917681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2407957 + ... + 2691245.

Almost surely, 2^722273917689 is an apocalyptic number.

722273917689 is the 849867-th square number.

722273917689 is the 424934-th centered octagonal number.

It is an amenable number.

722273917689 is a deficient number, since it is larger than the sum of its proper divisors (321014312854).

722273917689 is an frugal number, since it uses more digits than its factorization.

722273917689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566584 (or 283292 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 722273917689 in words is "seven hundred twenty-two billion, two hundred seventy-three million, nine hundred seventeen thousand, six hundred eighty-nine".