85219139 has 4 divisors (see below), whose sum is σ = 88157760. Its totient is φ = 82280520.

The previous prime is 85219133. The next prime is 85219157. The reversal of 85219139 is 93191258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93191258 = 2 ⋅46595629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85219139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85219133) 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, 1469267 + ... + 1469324.

It is an arithmetic number, because the mean of its divisors is an integer number (22039440).

Almost surely, 2^85219139 is an apocalyptic number.

85219139 is a deficient number, since it is larger than the sum of its proper divisors (2938621).

85219139 is a wasteful number, since it uses less digits than its factorization.

85219139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938620.

The product of its digits is 19440, while the sum is 38.

The square root of 85219139 is about 9231.4212881874. The cubic root of 85219139 is about 440.0604927159.

It can be divided in two parts, 85219 and 139, that added together give a palindrome (85358).

The spelling of 85219139 in words is "eighty-five million, two hundred nineteen thousand, one hundred thirty-nine".