75685 has 4 divisors (see below), whose sum is σ = 90828. Its totient is φ = 60544.

The previous prime is 75683. The next prime is 75689. The reversal of 75685 is 58657.

75685 = T₁₁₈ + T₁₁₉ + ... + T₁₂₇.

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 36481 + 39204 = 191^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 75685 - 2¹ = 75683 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 (75683) 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, 7564 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (22707).

2⁷⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

75685 is a deficient number, since it is larger than the sum of its proper divisors (15143).

75685 is a wasteful number, since it uses less digits than its factorization.

75685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15142.

The product of its digits is 8400, while the sum is 31.

The square root of 75685 is about 275.1090692798. The cubic root of 75685 is about 42.2996335573.

It can be divided in two parts, 756 and 85, that added together give a square (841 = 29²).

The spelling of 75685 in words is "seventy-five thousand, six hundred eighty-five".