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BaseRepresentation
bin1101010101
31011121
431111
511403
63541
72326
oct1525
91147
10853
11706
125b1
13508
1444d
153bd
hex355

853 has 2 divisors, whose sum is σ = 854. Its totient is φ = 852.

The previous prime is 839. The next prime is 857. The reversal of 853 is 358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529 + 324 = 23^2 + 18^2 .

853 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 853 - 25 = 821 is a prime.

It is the 24-th Perrin number.

It is a plaindrome in base 9, base 14, base 15 and base 16.

It is a nialpdrome in base 4 and base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426 + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (427).

It is an amenable number.

853 is a deficient number, since it is larger than the sum of its proper divisors (1).

853 is an equidigital number, since it uses as much as digits as its factorization.

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

The product of its digits is 120, while the sum is 16.

The square root of 853 is about 29.2061637330. The cubic root of 853 is about 9.4838136187.

It can be divided in two parts, 85 and 3, that added together give a palindrome (88).

The spelling of 853 in words is "eight hundred fifty-three", and thus it is an aban number and an oban number.