622657 has 4 divisors (see below), whose sum is σ = 711616. Its totient is φ = 533700.

The previous prime is 622639. The next prime is 622663. The reversal of 622657 is 756226.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 622657 - 2⁷ = 622529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44469 + ... + 44482.

It is an arithmetic number, because the mean of its divisors is an integer number (177904).

2⁶²²⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

622657 is a deficient number, since it is larger than the sum of its proper divisors (88959).

622657 is an equidigital number, since it uses as much as digits as its factorization.

622657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88958.

The product of its digits is 5040, while the sum is 28.

The square root of 622657 is about 789.0861803377. The cubic root of 622657 is about 85.3918242516.

The spelling of 622657 in words is "six hundred twenty-two thousand, six hundred fifty-seven".