84488191 has 4 divisors (see below), whose sum is σ = 84520584. Its totient is φ = 84455800.

The previous prime is 84488161. The next prime is 84488197. The reversal of 84488191 is 19188448.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84488191 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 (84488197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11905 + ... + 17626.

It is an arithmetic number, because the mean of its divisors is an integer number (21130146).

Almost surely, 2^84488191 is an apocalyptic number.

84488191 is a deficient number, since it is larger than the sum of its proper divisors (32393).

84488191 is a wasteful number, since it uses less digits than its factorization.

84488191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32392.

The product of its digits is 73728, while the sum is 43.

The square root of 84488191 is about 9191.7458080606. The cubic root of 84488191 is about 438.7987049391.

The spelling of 84488191 in words is "eighty-four million, four hundred eighty-eight thousand, one hundred ninety-one".