622730161 has 2 divisors, whose sum is σ = 622730162. Its totient is φ = 622730160.

The previous prime is 622730117. The next prime is 622730197. The reversal of 622730161 is 161037226.

622730161 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., 401761936 + 220968225 = 20044^2 + 14865^2 .

It is a cyclic number.

It is not a de Polignac number, because 622730161 - 2⁷ = 622730033 is a prime.

It is not a weakly prime, because it can be changed into another prime (622730561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311365080 + 311365081.

It is an arithmetic number, because the mean of its divisors is an integer number (311365081).

Almost surely, 2^622730161 is an apocalyptic number.

It is an amenable number.

622730161 is a deficient number, since it is larger than the sum of its proper divisors (1).

622730161 is an equidigital number, since it uses as much as digits as its factorization.

622730161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 622730161 is about 24954.5619276316. The cubic root of 622730161 is about 853.9516857895.

Adding to 622730161 its reverse (161037226), we get a palindrome (783767387).

The spelling of 622730161 in words is "six hundred twenty-two million, seven hundred thirty thousand, one hundred sixty-one".