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BaseRepresentation
bin10010010001
31121022
4102101
514134
65225
73260
oct2221
91538
101169
11973
12815
136bc
145d7
1552e
hex491

1169 has 4 divisors (see below), whose sum is σ = 1344. Its totient is φ = 996.

The previous prime is 1163. The next prime is 1171. The reversal of 1169 is 9611.

1169 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9611 = 71373.

It is a cyclic number.

It is not a de Polignac number, because 1169 - 24 = 1153 is a prime.

It is a super-2 number, since 2×11692 = 2733122, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 10 and base 13.

It is a nialpdrome in base 8 and base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163) 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, 77 + ... + 90.

It is an arithmetic number, because the mean of its divisors is an integer number (336).

It is an amenable number.

1169 is a deficient number, since it is larger than the sum of its proper divisors (175).

1169 is an equidigital number, since it uses as much as digits as its factorization.

1169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174.

The product of its digits is 54, while the sum is 17.

The square root of 1169 is about 34.1906419946. The cubic root of 1169 is about 10.5342794998.

It can be divided in two parts, 116 and 9, that added together give a cube (125 = 53).

The spelling of 1169 in words is "one thousand, one hundred sixty-nine".

Divisors: 1 7 167 1169