722272189 has 2 divisors, whose sum is σ = 722272190. Its totient is φ = 722272188.

The previous prime is 722272163. The next prime is 722272219. The reversal of 722272189 is 981272227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572405625 + 149866564 = 23925^2 + 12242^2 .

It is a cyclic number.

It is not a de Polignac number, because 722272189 - 2¹⁷ = 722141117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722272139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361136094 + 361136095.

It is an arithmetic number, because the mean of its divisors is an integer number (361136095).

Almost surely, 2^722272189 is an apocalyptic number.

It is an amenable number.

722272189 is a deficient number, since it is larger than the sum of its proper divisors (1).

722272189 is an equidigital number, since it uses as much as digits as its factorization.

722272189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 722272189 is about 26875.1221206528. The cubic root of 722272189 is about 897.2227924442. Note that the first 3 decimals are identical.

The spelling of 722272189 in words is "seven hundred twenty-two million, two hundred seventy-two thousand, one hundred eighty-nine".