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BaseRepresentation
bin101010111101
310202211
4222331
541444
620421
711005
oct5275
93684
102749
11207a
121711
131336
141005
15c34
hexabd

2749 has 2 divisors, whose sum is σ = 2750. Its totient is φ = 2748.

The previous prime is 2741. The next prime is 2753. The reversal of 2749 is 9472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849 + 900 = 43^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 2749 - 23 = 2741 is a prime.

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

It is a plaindrome in base 13 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1374 + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (1375).

It is an amenable number.

2749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749 is an equidigital number, since it uses as much as digits as its factorization.

2749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 2749 is about 52.4309069157. The cubic root of 2749 is about 14.0084982417.

Adding to 2749 its reverse (9472), we get a palindrome (12221).

The spelling of 2749 in words is "two thousand, seven hundred forty-nine".