623885 has 4 divisors (see below), whose sum is σ = 748668. Its totient is φ = 499104.

The previous prime is 623881. The next prime is 623893. The reversal of 623885 is 588326.

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

It can be written as a sum of positive squares in 2 ways, for example, as 316969 + 306916 = 563^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 623885 - 2² = 623881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623881) 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, 62384 + ... + 62393.

It is an arithmetic number, because the mean of its divisors is an integer number (187167).

2⁶²³⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

623885 is a deficient number, since it is larger than the sum of its proper divisors (124783).

623885 is a wasteful number, since it uses less digits than its factorization.

623885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124782.

The product of its digits is 11520, while the sum is 32.

The square root of 623885 is about 789.8639123292. The cubic root of 623885 is about 85.4479237842.

The spelling of 623885 in words is "six hundred twenty-three thousand, eight hundred eighty-five".