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83831 = 117621
BaseRepresentation
bin10100011101110111
311020222212
4110131313
510140311
61444035
7466256
oct243567
9136885
1083831
1157a90
124061b
132c207
142279d
1519c8b
hex14777

83831 has 4 divisors (see below), whose sum is σ = 91464. Its totient is φ = 76200.

The previous prime is 83813. The next prime is 83833. The reversal of 83831 is 13838.

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 83831 - 214 = 67447 is a prime.

It is a super-2 number, since 2×838312 = 14055273122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14 and base 16.

It is a junction number, because it is equal to n+sod(n) for n = 83797 and 83806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3800 + ... + 3821.

It is an arithmetic number, because the mean of its divisors is an integer number (22866).

283831 is an apocalyptic number.

83831 is a deficient number, since it is larger than the sum of its proper divisors (7633).

83831 is a wasteful number, since it uses less digits than its factorization.

83831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632.

The product of its digits is 576, while the sum is 23.

The square root of 83831 is about 289.5358354332. The cubic root of 83831 is about 43.7658010952.

The spelling of 83831 in words is "eighty-three thousand, eight hundred thirty-one".

Divisors: 1 11 7621 83831