85481939 has 4 divisors (see below), whose sum is σ = 85510656. Its totient is φ = 85453224.

The previous prime is 85481917. The next prime is 85481953. The reversal of 85481939 is 93918458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93918458 = 2 ⋅46959229.

It is a cyclic number.

It is not a de Polignac number, because 85481939 - 2²⁴ = 68704723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85481893 and 85481902.

It is not an unprimeable number, because it can be changed into a prime (85481959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9299 + ... + 16044.

It is an arithmetic number, because the mean of its divisors is an integer number (21377664).

Almost surely, 2^85481939 is an apocalyptic number.

85481939 is a deficient number, since it is larger than the sum of its proper divisors (28717).

85481939 is a wasteful number, since it uses less digits than its factorization.

85481939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28716.

The product of its digits is 311040, while the sum is 47.

The square root of 85481939 is about 9245.6443258434. The cubic root of 85481939 is about 440.5123834657.

The spelling of 85481939 in words is "eighty-five million, four hundred eighty-one thousand, nine hundred thirty-nine".