622447 has 6 divisors (see below), whose sum is σ = 724128. Its totient is φ = 533484.

The previous prime is 622423. The next prime is 622477. The reversal of 622447 is 744226.

It is a de Polignac number, because none of the positive numbers 2^k-622447 is a prime.

It is a Duffinian number.

622447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6303 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (120688).

2⁶²²⁴⁴⁷ is an apocalyptic number.

622447 is a deficient number, since it is larger than the sum of its proper divisors (101681).

622447 is a wasteful number, since it uses less digits than its factorization.

622447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12717 (or 12710 counting only the distinct ones).

The product of its digits is 2688, while the sum is 25.

The square root of 622447 is about 788.9531038028. The cubic root of 622447 is about 85.3822232998.

The spelling of 622447 in words is "six hundred twenty-two thousand, four hundred forty-seven".