622864861 has 2 divisors, whose sum is σ = 622864862. Its totient is φ = 622864860.

The previous prime is 622864843. The next prime is 622864889. The reversal of 622864861 is 168468226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 584188900 + 38675961 = 24170^2 + 6219^2 .

It is a cyclic number.

It is not a de Polignac number, because 622864861 - 2⁷ = 622864733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622864811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311432430 + 311432431.

It is an arithmetic number, because the mean of its divisors is an integer number (311432431).

Almost surely, 2^622864861 is an apocalyptic number.

It is an amenable number.

622864861 is a deficient number, since it is larger than the sum of its proper divisors (1).

622864861 is an equidigital number, since it uses as much as digits as its factorization.

622864861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 622864861 is about 24957.2606870225. The cubic root of 622864861 is about 854.0132528515.

The spelling of 622864861 in words is "six hundred twenty-two million, eight hundred sixty-four thousand, eight hundred sixty-one".