85088139 has 4 divisors (see below), whose sum is σ = 113450856. Its totient is φ = 56725424.

The previous prime is 85088131. The next prime is 85088167. The reversal of 85088139 is 93188058.

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 85088139 - 2³ = 85088131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85088139.

It is not an unprimeable number, because it can be changed into a prime (85088131) 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, 14181354 + ... + 14181359.

It is an arithmetic number, because the mean of its divisors is an integer number (28362714).

Almost surely, 2^85088139 is an apocalyptic number.

85088139 is a deficient number, since it is larger than the sum of its proper divisors (28362717).

85088139 is a wasteful number, since it uses less digits than its factorization.

85088139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28362716.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 85088139 is about 9224.3232272075. The cubic root of 85088139 is about 439.8348881177.

The spelling of 85088139 in words is "eighty-five million, eighty-eight thousand, one hundred thirty-nine".