852878191 has 4 divisors (see below), whose sum is σ = 930412584. Its totient is φ = 775343800.

The previous prime is 852878167. The next prime is 852878227. The reversal of 852878191 is 191878258.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 852878191 - 2¹⁵ = 852845423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852878141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38767180 + ... + 38767201.

It is an arithmetic number, because the mean of its divisors is an integer number (232603146).

Almost surely, 2^852878191 is an apocalyptic number.

852878191 is a deficient number, since it is larger than the sum of its proper divisors (77534393).

852878191 is a wasteful number, since it uses less digits than its factorization.

852878191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77534392.

The product of its digits is 322560, while the sum is 49.

The square root of 852878191 is about 29204.0783282061. The cubic root of 852878191 is about 948.3362165488.

The spelling of 852878191 in words is "eight hundred fifty-two million, eight hundred seventy-eight thousand, one hundred ninety-one".