85139853 has 8 divisors (see below), whose sum is σ = 117434400. Its totient is φ = 54802608.

The previous prime is 85139851. The next prime is 85139881. The reversal of 85139853 is 35893158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85139853 - 2¹ = 85139851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85139851) 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 7 ways as a sum of consecutive naturals, for example, 489223 + ... + 489396.

It is an arithmetic number, because the mean of its divisors is an integer number (14679300).

Almost surely, 2^85139853 is an apocalyptic number.

It is an amenable number.

85139853 is a deficient number, since it is larger than the sum of its proper divisors (32294547).

85139853 is a wasteful number, since it uses less digits than its factorization.

85139853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978651.

The product of its digits is 129600, while the sum is 42.

The square root of 85139853 is about 9227.1259338973. The cubic root of 85139853 is about 439.9239761903.

It can be divided in two parts, 851 and 39853, that added together give a palindrome (40704).

The spelling of 85139853 in words is "eighty-five million, one hundred thirty-nine thousand, eight hundred fifty-three".