622861 has 2 divisors, whose sum is σ = 622862. Its totient is φ = 622860.

The previous prime is 622849. The next prime is 622879. The reversal of 622861 is 168226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 37636 = 765^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 622861 - 2¹¹ = 620813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311430 + 311431.

It is an arithmetic number, because the mean of its divisors is an integer number (311431).

2⁶²²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

622861 is a deficient number, since it is larger than the sum of its proper divisors (1).

622861 is an equidigital number, since it uses as much as digits as its factorization.

622861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 622861 is about 789.2154331993. The cubic root of 622861 is about 85.4011488235.

The spelling of 622861 in words is "six hundred twenty-two thousand, eight hundred sixty-one".