623889 has 16 divisors (see below), whose sum is σ = 1056640. Its totient is φ = 356400.

The previous prime is 623881. The next prime is 623893. The reversal of 623889 is 988326.

It is not a de Polignac number, because 623889 - 2³ = 623881 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (623881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1462 + ... + 1839.

It is an arithmetic number, because the mean of its divisors is an integer number (66040).

2⁶²³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

623889 is a deficient number, since it is larger than the sum of its proper divisors (432751).

623889 is a wasteful number, since it uses less digits than its factorization.

623889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3311 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 623889 is about 789.8664444069. The cubic root of 623889 is about 85.4481063985.

The spelling of 623889 in words is "six hundred twenty-three thousand, eight hundred eighty-nine".