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680943 = 3613
BaseRepresentation
bin10100110001111101111
31021121002010
42212033233
5133242233
622332303
75534154
oct2461757
91247063
10680943
1142566a
1228a093
131aac33
1413a22b
15d6b63
hexa63ef

680943 has 8 divisors (see below), whose sum is σ = 923056. Its totient is φ = 446520.

The previous prime is 680929. The next prime is 680959. The reversal of 680943 is 349086.

It is an ABA number since it can be written as A⋅BA, here for A=3, B=61.

It is not a de Polignac number, because 680943 - 26 = 680879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11133 + ... + 11193.

It is an arithmetic number, because the mean of its divisors is an integer number (115382).

2680943 is an apocalyptic number.

680943 is a deficient number, since it is larger than the sum of its proper divisors (242113).

680943 is an frugal number, since it uses more digits than its factorization.

680943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 680943 is about 825.1927047666. The cubic root of 680943 is about 87.9772237888.

The spelling of 680943 in words is "six hundred eighty thousand, nine hundred forty-three".

Divisors: 1 3 61 183 3721 11163 226981 680943