623859 has 4 divisors (see below), whose sum is σ = 831816. Its totient is φ = 415904.

The previous prime is 623851. The next prime is 623867. The reversal of 623859 is 958326.

It is a happy number.

623859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

623859 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (623851) and next prime (623867).

It is a cyclic number.

It is not a de Polignac number, because 623859 - 2³ = 623851 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 2¹⁴ + 8² + 3¹² + 5⁶ + 9⁵ .

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (623851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103974 + ... + 103979.

It is an arithmetic number, because the mean of its divisors is an integer number (207954).

2⁶²³⁸⁵⁹ is an apocalyptic number.

623859 is a deficient number, since it is larger than the sum of its proper divisors (207957).

623859 is a wasteful number, since it uses less digits than its factorization.

623859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207956.

The product of its digits is 12960, while the sum is 33.

The square root of 623859 is about 789.8474536263. The cubic root of 623859 is about 85.4467367722.

The spelling of 623859 in words is "six hundred twenty-three thousand, eight hundred fifty-nine".