621889 has 8 divisors (see below), whose sum is σ = 665280. Its totient is φ = 579600.

The previous prime is 621883. The next prime is 621893. The reversal of 621889 is 988126.

621889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621889 - 2¹¹ = 619841 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621883) 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, 1119 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2⁶²¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

621889 is a deficient number, since it is larger than the sum of its proper divisors (43391).

621889 is a wasteful number, since it uses less digits than its factorization.

621889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its digits is 6912, while the sum is 34.

The square root of 621889 is about 788.5993913262. The cubic root of 621889 is about 85.3567017028.

The spelling of 621889 in words is "six hundred twenty-one thousand, eight hundred eighty-nine".