Search a number
-
+
680089 = 6111149
BaseRepresentation
bin10100110000010011001
31021112220111
42212002121
5133230324
622324321
75531524
oct2460231
91245814
10680089
11424a63
122896a1
131aa727
14139bbb
15d6794
hexa6099

680089 has 4 divisors (see below), whose sum is σ = 691300. Its totient is φ = 668880.

The previous prime is 680083. The next prime is 680107. The reversal of 680089 is 980086.

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 94864 + 585225 = 308^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 680089 - 23 = 680081 is a prime.

680089 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

680089 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 680089.

It is not an unprimeable number, because it can be changed into a prime (680081) 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, 5514 + ... + 5635.

It is an arithmetic number, because the mean of its divisors is an integer number (172825).

2680089 is an apocalyptic number.

It is an amenable number.

680089 is a deficient number, since it is larger than the sum of its proper divisors (11211).

680089 is a wasteful number, since it uses less digits than its factorization.

680089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 680089 is about 824.6750875345. The cubic root of 680089 is about 87.9404297252.

It can be divided in two parts, 6800 and 89, that added together give a square (6889 = 832).

The spelling of 680089 in words is "six hundred eighty thousand, eighty-nine".

Divisors: 1 61 11149 680089