85473239 has 4 divisors (see below), whose sum is σ = 85652160. Its totient is φ = 85294320.

The previous prime is 85473209. The next prime is 85473251. The reversal of 85473239 is 93237458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93237458 = 2 ⋅46618729.

It is a cyclic number.

It is not a de Polignac number, because 85473239 - 2¹² = 85469143 is a prime.

It is a super-2 number, since 2×85473239² = 14611349170302242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85473196 and 85473205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85473209) 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, 88742 + ... + 89699.

It is an arithmetic number, because the mean of its divisors is an integer number (21413040).

Almost surely, 2^85473239 is an apocalyptic number.

85473239 is a deficient number, since it is larger than the sum of its proper divisors (178921).

85473239 is a wasteful number, since it uses less digits than its factorization.

85473239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178920.

The product of its digits is 181440, while the sum is 41.

The square root of 85473239 is about 9245.1738220544. The cubic root of 85473239 is about 440.4974384461.

The spelling of 85473239 in words is "eighty-five million, four hundred seventy-three thousand, two hundred thirty-nine".