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680087183 = 4315815981
BaseRepresentation
bin101000100010010…
…100111010001111
31202101201000020012
4220202110322033
52343100242213
6151252343435
722565434316
oct5042247217
91671630205
10680087183
11319989626
1216b914b7b
13aab89869
146647327d
153ea8c4a8
hex28894e8f

680087183 has 4 divisors (see below), whose sum is σ = 695903208. Its totient is φ = 664271160.

The previous prime is 680087171. The next prime is 680087201. The reversal of 680087183 is 381780086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 381780086 = 2190890043.

It is a cyclic number.

It is not a de Polignac number, because 680087183 - 226 = 612978319 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 680087183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680087113) 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, 7907948 + ... + 7908033.

It is an arithmetic number, because the mean of its divisors is an integer number (173975802).

Almost surely, 2680087183 is an apocalyptic number.

680087183 is a deficient number, since it is larger than the sum of its proper divisors (15816025).

680087183 is a wasteful number, since it uses less digits than its factorization.

680087183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15816024.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 680087183 is about 26078.4812249487. The cubic root of 680087183 is about 879.4035140807.

The spelling of 680087183 in words is "six hundred eighty million, eighty-seven thousand, one hundred eighty-three".

Divisors: 1 43 15815981 680087183