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2943 = 33109
BaseRepresentation
bin101101111111
311001000
4231333
543233
621343
711403
oct5577
94030
102943
112236
121853
131455
141103
15d13
hexb7f

2943 has 8 divisors (see below), whose sum is σ = 4400. Its totient is φ = 1944.

The previous prime is 2939. The next prime is 2953. The reversal of 2943 is 3492.

It is not a de Polignac number, because 2943 - 22 = 2939 is a prime.

It is a super-2 number, since 2×29432 = 17322498, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

2943 is a lucky number.

It is a plaindrome in base 8, base 11 and base 13.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28 + ... + 81.

It is an arithmetic number, because the mean of its divisors is an integer number (550).

22943 is an apocalyptic number.

2943 is a deficient number, since it is larger than the sum of its proper divisors (1457).

2943 is a wasteful number, since it uses less digits than its factorization.

2943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 112 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2943 is about 54.2494239601. The cubic root of 2943 is about 14.3305685431.

The spelling of 2943 in words is "two thousand, nine hundred forty-three".

Divisors: 1 3 9 27 109 327 981 2943