622789 has 4 divisors (see below), whose sum is σ = 624780. Its totient is φ = 620800.

The previous prime is 622781. The next prime is 622793. The reversal of 622789 is 987226.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 448900 + 173889 = 670^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 622789 - 2³ = 622781 is a prime.

It is a super-2 number, since 2×622789² = 775732277042, which contains 22 as substring.

It is a Duffinian number.

622789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622781) 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 in 3 ways as a sum of consecutive naturals, for example, 412 + ... + 1189.

It is an arithmetic number, because the mean of its divisors is an integer number (156195).

2⁶²²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

622789 is a deficient number, since it is larger than the sum of its proper divisors (1991).

622789 is a wasteful number, since it uses less digits than its factorization.

622789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990.

The product of its digits is 12096, while the sum is 34.

The square root of 622789 is about 789.1698169596. The cubic root of 622789 is about 85.3978580307.

The spelling of 622789 in words is "six hundred twenty-two thousand, seven hundred eighty-nine".