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680023 = 3718379
BaseRepresentation
bin10100110000001010111
31021112211001
42212001113
5133230043
622324131
75531401
oct2460127
91245731
10680023
11424a03
12289647
131aa6a6
14139b71
15d674d
hexa6057

680023 has 4 divisors (see below), whose sum is σ = 698440. Its totient is φ = 661608.

The previous prime is 680003. The next prime is 680027. The reversal of 680023 is 320086.

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 680023 - 213 = 671831 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 (680027) 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, 9153 + ... + 9226.

It is an arithmetic number, because the mean of its divisors is an integer number (174610).

2680023 is an apocalyptic number.

680023 is a deficient number, since it is larger than the sum of its proper divisors (18417).

680023 is a wasteful number, since it uses less digits than its factorization.

680023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 680023 is about 824.6350708040. The cubic root of 680023 is about 87.9375848740.

The spelling of 680023 in words is "six hundred eighty thousand, twenty-three".

Divisors: 1 37 18379 680023