622667 has 4 divisors (see below), whose sum is σ = 637896. Its totient is φ = 607440.

The previous prime is 622663. The next prime is 622669. The reversal of 622667 is 766226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766226 = 2 ⋅383113.

It is a cyclic number.

It is not a de Polignac number, because 622667 - 2² = 622663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622663) 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, 7553 + ... + 7634.

It is an arithmetic number, because the mean of its divisors is an integer number (159474).

2⁶²²⁶⁶⁷ is an apocalyptic number.

622667 is a deficient number, since it is larger than the sum of its proper divisors (15229).

622667 is a wasteful number, since it uses less digits than its factorization.

622667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15228.

The product of its digits is 6048, while the sum is 29.

The square root of 622667 is about 789.0925167558. The cubic root of 622667 is about 85.3922813859.

The spelling of 622667 in words is "six hundred twenty-two thousand, six hundred sixty-seven".