622166389 has 8 divisors (see below), whose sum is σ = 681010232. Its totient is φ = 564891840.

The previous prime is 622166339. The next prime is 622166393. The reversal of 622166389 is 983661226.

It can be written as a sum of positive squares in 4 ways, for example, as 14938225 + 607228164 = 3865^2 + 24642^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 622166389 - 2¹⁷ = 622035317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622166309) 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 7 ways as a sum of consecutive naturals, for example, 391494 + ... + 393079.

It is an arithmetic number, because the mean of its divisors is an integer number (85126279).

Almost surely, 2^622166389 is an apocalyptic number.

It is an amenable number.

622166389 is a deficient number, since it is larger than the sum of its proper divisors (58843843).

622166389 is a wasteful number, since it uses less digits than its factorization.

622166389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784647.

The product of its digits is 186624, while the sum is 43.

The square root of 622166389 is about 24943.2633991625. The cubic root of 622166389 is about 853.6939072536.

The spelling of 622166389 in words is "six hundred twenty-two million, one hundred sixty-six thousand, three hundred eighty-nine".