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85823 = 194517
BaseRepresentation
bin10100111100111111
311100201122
4110330333
510221243
61501155
7505133
oct247477
9140648
1085823
1159531
12417bb
13300aa
14233c3
151a668
hex14f3f

85823 has 4 divisors (see below), whose sum is σ = 90360. Its totient is φ = 81288.

The previous prime is 85819. The next prime is 85829. The reversal of 85823 is 32858.

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 85823 - 22 = 85819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85792 and 85801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85829) 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, 2240 + ... + 2277.

It is an arithmetic number, because the mean of its divisors is an integer number (22590).

285823 is an apocalyptic number.

85823 is a deficient number, since it is larger than the sum of its proper divisors (4537).

85823 is a wasteful number, since it uses less digits than its factorization.

85823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536.

The product of its digits is 1920, while the sum is 26.

The square root of 85823 is about 292.9556280395. The cubic root of 85823 is about 44.1097466986.

Adding to 85823 its sum of digits (26), we get a square (85849 = 2932).

The spelling of 85823 in words is "eighty-five thousand, eight hundred twenty-three".

Divisors: 1 19 4517 85823