85439423 has 4 divisors (see below), whose sum is σ = 88385640. Its totient is φ = 82493208.

The previous prime is 85439383. The next prime is 85439429. The reversal of 85439423 is 32493458.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85439423 - 2⁶ = 85439359 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 (85439429) 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, 1473065 + ... + 1473122.

It is an arithmetic number, because the mean of its divisors is an integer number (22096410).

Almost surely, 2^85439423 is an apocalyptic number.

85439423 is a deficient number, since it is larger than the sum of its proper divisors (2946217).

85439423 is a wasteful number, since it uses less digits than its factorization.

85439423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946216.

The product of its digits is 103680, while the sum is 38.

The square root of 85439423 is about 9243.3447950404. The cubic root of 85439423 is about 440.4393390674.

The spelling of 85439423 in words is "eighty-five million, four hundred thirty-nine thousand, four hundred twenty-three".