623389 has 8 divisors (see below), whose sum is σ = 680960. Its totient is φ = 567216.

The previous prime is 623387. The next prime is 623393. The reversal of 623389 is 983326.

It is a happy number.

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

It is not a de Polignac number, because 623389 - 2¹ = 623387 is a prime.

It is a super-2 number, since 2×623389² = 777227690642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623383) 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, 724 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (85120).

2⁶²³³⁸⁹ is an apocalyptic number.

It is an amenable number.

623389 is a deficient number, since it is larger than the sum of its proper divisors (57571).

623389 is a wasteful number, since it uses less digits than its factorization.

623389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its digits is 7776, while the sum is 31.

The square root of 623389 is about 789.5498717624. The cubic root of 623389 is about 85.4252735593.

The spelling of 623389 in words is "six hundred twenty-three thousand, three hundred eighty-nine".