622740917 has 2 divisors, whose sum is σ = 622740918. Its totient is φ = 622740916.

The previous prime is 622740907. The next prime is 622740953. The reversal of 622740917 is 719047226.

622740917 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., 383141476 + 239599441 = 19574^2 + 15479^2 .

It is a cyclic number.

It is not a de Polignac number, because 622740917 - 2²⁶ = 555632053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622740907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311370458 + 311370459.

It is an arithmetic number, because the mean of its divisors is an integer number (311370459).

Almost surely, 2^622740917 is an apocalyptic number.

It is an amenable number.

622740917 is a deficient number, since it is larger than the sum of its proper divisors (1).

622740917 is an equidigital number, since it uses as much as digits as its factorization.

622740917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 622740917 is about 24954.7774383984. Note that the first 3 decimals coincide. The cubic root of 622740917 is about 853.9566023392.

The spelling of 622740917 in words is "six hundred twenty-two million, seven hundred forty thousand, nine hundred seventeen".