622652209 has 3 divisors (see below), whose sum is σ = 622677163. Its totient is φ = 622627256.

The previous prime is 622652203. The next prime is 622652213. The reversal of 622652209 is 902256226.

The square root of 622652209 is 24953.

It is a perfect power (a square), and thus also a powerful number.

622652209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 only one way, i.e., 451775025 + 170877184 = 21255^2 + 13072^2 .

It is a de Polignac number, because none of the positive numbers 2^k-622652209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622652203) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12477 + ... + 37429.

Almost surely, 2^622652209 is an apocalyptic number.

622652209 is the 24953-rd square number.

622652209 is the 12477-th centered octagonal number.

It is an amenable number.

622652209 is a deficient number, since it is larger than the sum of its proper divisors (24954).

622652209 is an frugal number, since it uses more digits than its factorization.

622652209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49906 (or 24953 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The cubic root of 622652209 is about 853.9160523676.

The spelling of 622652209 in words is "six hundred twenty-two million, six hundred fifty-two thousand, two hundred nine".