622909 has 16 divisors (see below), whose sum is σ = 767232. Its totient is φ = 494208.

The previous prime is 622901. The next prime is 622927. The reversal of 622909 is 909226.

It is a 4-Lehmer number, since φ(622909) divides (622909-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 622909 - 2³ = 622901 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 (622901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8497 + ... + 8569.

It is an arithmetic number, because the mean of its divisors is an integer number (47952).

It is a Poulet number, since it divides 2⁶²²⁹⁰⁸-1.

2⁶²²⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

622909 is a deficient number, since it is larger than the sum of its proper divisors (144323).

622909 is a wasteful number, since it uses less digits than its factorization.

622909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 622909 is about 789.2458425611. The cubic root of 622909 is about 85.4033425446.

The spelling of 622909 in words is "six hundred twenty-two thousand, nine hundred nine".