85139955 has 24 divisors (see below), whose sum is σ = 147841200. Its totient is φ = 45326400.

The previous prime is 85139939. The next prime is 85139993. The reversal of 85139955 is 55993158.

It is not a de Polignac number, because 85139955 - 2⁴ = 85139939 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 85139955.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 30196 + ... + 32894.

It is an arithmetic number, because the mean of its divisors is an integer number (6160050).

Almost surely, 2^85139955 is an apocalyptic number.

85139955 is a deficient number, since it is larger than the sum of its proper divisors (62701245).

85139955 is a wasteful number, since it uses less digits than its factorization.

85139955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411 (or 3408 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 85139955 is about 9227.1314610772. The cubic root of 85139955 is about 439.9241518708.

The spelling of 85139955 in words is "eighty-five million, one hundred thirty-nine thousand, nine hundred fifty-five".