65749 has 4 divisors (see below), whose sum is σ = 67564.
Its totient is φ = 63936.
The previous prime is 65731. The next prime is 65761. The reversal of 65749 is 94756.
65749 is nontrivially palindromic in base 6.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 18225 = 218^2 + 135^2
It is not a de Polignac number, because 65749 - 25 = 65717 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 65749.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (65719) 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, 852 + ... + 925.
It is an arithmetic number, because the mean of its divisors is an integer number (16891).
265749 is an apocalyptic number.
It is an amenable number.
65749 is a deficient number, since it is larger than the sum of its proper divisors (1815).
65749 is a wasteful number, since it uses less digits than its factorization.
65749 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1814.
The product of its digits is 7560, while the sum is 31.
The square root of 65749 is about 256.4156781478.
The cubic root of 65749 is about 40.3611052649.
The spelling of 65749 in words is "sixty-five thousand, seven hundred forty-nine".