9749 has 2 divisors, whose sum is σ = 9750. Its totient is φ = 9748.
The previous prime is 9743. The next prime is 9767. The reversal of 9749 is 9479.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 6724 + 3025 = 82^2 + 55^2 .
It is an emirp because it is prime and its reverse (9479) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 9749 - 24 = 9733 is a prime.
It is a plaindrome in base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 9749.
It is not a weakly prime, because it can be changed into another prime (9743) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4874 + 4875.
It is an arithmetic number, because the mean of its divisors is an integer number (4875).
29749 is an apocalyptic number.
It is an amenable number.
9749 is a deficient number, since it is larger than the sum of its proper divisors (1).
9749 is an equidigital number, since it uses as much as digits as its factorization.
9749 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2268, while the sum is 29.
The square root of 9749 is about 98.7370244640. The cubic root of 9749 is about 21.3625630145.
It can be divided in two parts, 97 and 49, that multiplied together give a triangular number (4753 = T97).
The spelling of 9749 in words is "nine thousand, seven hundred forty-nine".
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