85423 has 4 divisors (see below), whose sum is σ = 92008. Its totient is φ = 78840.

The previous prime is 85411. The next prime is 85427. The reversal of 85423 is 32458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32458 = 2 ⋅16229.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85394 and 85403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85427) 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, 3273 + ... + 3298.

It is an arithmetic number, because the mean of its divisors is an integer number (23002).

2⁸⁵⁴²³ is an apocalyptic number.

85423 is a deficient number, since it is larger than the sum of its proper divisors (6585).

85423 is a wasteful number, since it uses less digits than its factorization.

85423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584.

The product of its digits is 960, while the sum is 22.

The square root of 85423 is about 292.2721334647. The cubic root of 85423 is about 44.0411117128.

The spelling of 85423 in words is "eighty-five thousand, four hundred twenty-three".