73685 has 4 divisors (see below), whose sum is σ = 88428. Its totient is φ = 58944.

The previous prime is 73681. The next prime is 73693. The reversal of 73685 is 58637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58637 = 191 ⋅307.

It can be written as a sum of positive squares in 2 ways, for example, as 45796 + 27889 = 214^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 73685 - 2² = 73681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7364 + ... + 7373.

It is an arithmetic number, because the mean of its divisors is an integer number (22107).

2⁷³⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

73685 is a deficient number, since it is larger than the sum of its proper divisors (14743).

73685 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 73685 = (36785)₁₂.

73685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14742.

The product of its digits is 5040, while the sum is 29.

The square root of 73685 is about 271.4498111991. The cubic root of 73685 is about 41.9237088210.

It can be divided in two parts, 73 and 685, that multiplied together give a palindrome (50005).

The spelling of 73685 in words is "seventy-three thousand, six hundred eighty-five".