622309 has 4 divisors (see below), whose sum is σ = 623916. Its totient is φ = 620704.

The previous prime is 622301. The next prime is 622313. The reversal of 622309 is 903226.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 422500 = 447^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 622309 - 2³ = 622301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 622309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622301) 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 in 3 ways as a sum of consecutive naturals, for example, 177 + ... + 1129.

It is an arithmetic number, because the mean of its divisors is an integer number (155979).

2⁶²²³⁰⁹ is an apocalyptic number.

It is an amenable number.

622309 is a deficient number, since it is larger than the sum of its proper divisors (1607).

622309 is an equidigital number, since it uses as much as digits as its factorization.

622309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 622309 is about 788.8656412850. The cubic root of 622309 is about 85.3759129271.

The spelling of 622309 in words is "six hundred twenty-two thousand, three hundred nine".