680923 has 4 divisors (see below), whose sum is σ = 687280. Its totient is φ = 674568.

The previous prime is 680917. The next prime is 680929. The reversal of 680923 is 329086.

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 (680917) and next prime (680929).

It is a cyclic number.

It is not a de Polignac number, because 680923 - 2⁹ = 680411 is a prime.

It is a super-2 number, since 2×680923² = 927312263858, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680891 and 680900.

It is not an unprimeable number, because it can be changed into a prime (680929) 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, 3015 + ... + 3232.

It is an arithmetic number, because the mean of its divisors is an integer number (171820).

2⁶⁸⁰⁹²³ is an apocalyptic number.

680923 is a deficient number, since it is larger than the sum of its proper divisors (6357).

680923 is a wasteful number, since it uses less digits than its factorization.

680923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 680923 is about 825.1805862961. The cubic root of 680923 is about 87.9763624530.

The spelling of 680923 in words is "six hundred eighty thousand, nine hundred twenty-three".