622891 has 8 divisors (see below), whose sum is σ = 659520. Its totient is φ = 587328.

The previous prime is 622889. The next prime is 622901. The reversal of 622891 is 198226.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 622891 - 2¹ = 622889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (82440).

2⁶²²⁸⁹¹ is an apocalyptic number.

622891 is a deficient number, since it is larger than the sum of its proper divisors (36629).

622891 is a wasteful number, since it uses less digits than its factorization.

622891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533.

The product of its digits is 1728, while the sum is 28.

The square root of 622891 is about 789.2344391877. The cubic root of 622891 is about 85.4025199124.

The spelling of 622891 in words is "six hundred twenty-two thousand, eight hundred ninety-one".