685023 has 4 divisors (see below), whose sum is σ = 913368. Its totient is φ = 456680.

The previous prime is 685019. The next prime is 685031. The reversal of 685023 is 320586.

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

It is a cyclic number.

It is not a de Polignac number, because 685023 - 2² = 685019 is a prime.

It is a D-number.

685023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 684984 and 685002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685063) 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, 114168 + ... + 114173.

It is an arithmetic number, because the mean of its divisors is an integer number (228342).

2⁶⁸⁵⁰²³ is an apocalyptic number.

685023 is a deficient number, since it is larger than the sum of its proper divisors (228345).

685023 is a wasteful number, since it uses less digits than its factorization.

685023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228344.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 685023 is about 827.6611625539. The cubic root of 685023 is about 88.1525847954.

The spelling of 685023 in words is "six hundred eighty-five thousand, twenty-three".