622783561 has 2 divisors, whose sum is σ = 622783562. Its totient is φ = 622783560.

The previous prime is 622783547. The next prime is 622783573. The reversal of 622783561 is 165387226.

622783561 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., 548496400 + 74287161 = 23420^2 + 8619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622783561 is a prime.

It is not a weakly prime, because it can be changed into another prime (622783531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311391780 + 311391781.

It is an arithmetic number, because the mean of its divisors is an integer number (311391781).

Almost surely, 2^622783561 is an apocalyptic number.

It is an amenable number.

622783561 is a deficient number, since it is larger than the sum of its proper divisors (1).

622783561 is an equidigital number, since it uses as much as digits as its factorization.

622783561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 622783561 is about 24955.6318493441. The cubic root of 622783561 is about 853.9760942837.

The spelling of 622783561 in words is "six hundred twenty-two million, seven hundred eighty-three thousand, five hundred sixty-one".