65723 has 8 divisors (see below), whose sum is σ = 77280. Its totient is φ = 54720.

The previous prime is 65719. The next prime is 65729. The reversal of 65723 is 32756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65723 - 2² = 65719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173 + ... + 401.

It is an arithmetic number, because the mean of its divisors is an integer number (9660).

2⁶⁵⁷²³ is an apocalyptic number.

65723 is a deficient number, since it is larger than the sum of its proper divisors (11557).

65723 is a wasteful number, since it uses less digits than its factorization.

65723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277.

The product of its digits is 1260, while the sum is 23.

The square root of 65723 is about 256.3649742067. The cubic root of 65723 is about 40.3557843876.

The spelling of 65723 in words is "sixty-five thousand, seven hundred twenty-three".