622439 has 4 divisors (see below), whose sum is σ = 624624. Its totient is φ = 620256.

The previous prime is 622423. The next prime is 622477. The reversal of 622439 is 934226.

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

It is a cyclic number.

It is not a de Polignac number, because 622439 - 2⁴ = 622423 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 (622639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 1260.

It is an arithmetic number, because the mean of its divisors is an integer number (156156).

2⁶²²⁴³⁹ is an apocalyptic number.

622439 is a deficient number, since it is larger than the sum of its proper divisors (2185).

622439 is a wasteful number, since it uses less digits than its factorization.

622439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its digits is 2592, while the sum is 26.

The square root of 622439 is about 788.9480337766. The cubic root of 622439 is about 85.3818575066.

The spelling of 622439 in words is "six hundred twenty-two thousand, four hundred thirty-nine".