622637 has 2 divisors, whose sum is σ = 622638. Its totient is φ = 622636.

The previous prime is 622621. The next prime is 622639. The reversal of 622637 is 736226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 188356 = 659^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 622637 - 2⁴ = 622621 is a prime.

Together with 622639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 622637.

It is not a weakly prime, because it can be changed into another prime (622639) 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, 311318 + 311319.

It is an arithmetic number, because the mean of its divisors is an integer number (311319).

2⁶²²⁶³⁷ is an apocalyptic number.

It is an amenable number.

622637 is a deficient number, since it is larger than the sum of its proper divisors (1).

622637 is an equidigital number, since it uses as much as digits as its factorization.

622637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 26.

The square root of 622637 is about 789.0735073490. The cubic root of 622637 is about 85.3909099682.

The spelling of 622637 in words is "six hundred twenty-two thousand, six hundred thirty-seven".