622145309 has 2 divisors, whose sum is σ = 622145310. Its totient is φ = 622145308.

The previous prime is 622145299. The next prime is 622145389. The reversal of 622145309 is 903541226.

It is a happy number.

622145309 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., 525418084 + 96727225 = 22922^2 + 9835^2 .

It is a cyclic number.

It is not a de Polignac number, because 622145309 - 2⁸ = 622145053 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 (622145389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311072654 + 311072655.

It is an arithmetic number, because the mean of its divisors is an integer number (311072655).

Almost surely, 2^622145309 is an apocalyptic number.

It is an amenable number.

622145309 is a deficient number, since it is larger than the sum of its proper divisors (1).

622145309 is an equidigital number, since it uses as much as digits as its factorization.

622145309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 622145309 is about 24942.8408366008. The cubic root of 622145309 is about 853.6842656363.

The spelling of 622145309 in words is "six hundred twenty-two million, one hundred forty-five thousand, three hundred nine".