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2783 = 11223

2783 has 6 divisors (see below), whose sum is σ = 3192. Its totient is φ = 2420.

The previous prime is 2777. The next prime is 2789. The reversal of 2783 is 3872.

It is an interprime number because it is at equal distance from previous prime (2777) and next prime (2789).

It is not a de Polignac number, because 2783 - 24 = 2767 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110 + ... + 132.

It is an arithmetic number, because the mean of its divisors is an integer number (532).

2783 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2783 is a deficient number, since it is larger than the sum of its proper divisors (409).

2783 is a wasteful number, since it uses less digits than its factorization.

With its successor (2784) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (34).

2783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45 (or 34 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 2783 is about 52.7541467564. The cubic root of 2783 is about 14.0660147593.

Subtracting 2783 from its reverse (3872), we obtain a square (1089 = 332).

The spelling of 2783 in words is "two thousand, seven hundred eighty-three".

Divisors: 1 11 23 121 253 2783