85747 has 4 divisors (see below), whose sum is σ = 90280. Its totient is φ = 81216.

The previous prime is 85733. The next prime is 85751. The reversal of 85747 is 74758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74758 = 2 ⋅37379.

It is a cyclic number.

It is not a de Polignac number, because 85747 - 2⁷ = 85619 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (85717) 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, 2238 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (22570).

2⁸⁵⁷⁴⁷ is an apocalyptic number.

85747 is a deficient number, since it is larger than the sum of its proper divisors (4533).

85747 is a wasteful number, since it uses less digits than its factorization.

85747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532.

The product of its digits is 7840, while the sum is 31.

The square root of 85747 is about 292.8258868338. The cubic root of 85747 is about 44.0967224868.

The spelling of 85747 in words is "eighty-five thousand, seven hundred forty-seven".