888191 has 8 divisors (see below), whose sum is σ = 941280. Its totient is φ = 837936.

The previous prime is 888179. The next prime is 888203. The reversal of 888191 is 191888.

It is an interprime number because it is at equal distance from previous prime (888179) and next prime (888203).

It is a de Polignac number, because none of the positive numbers 2^k-888191 is a prime.

It is a Duffinian number.

Its product of digits (4608) is a multiple of the sum of its prime divisors (96).

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 888191.

It is not an unprimeable number, because it can be changed into a prime (888161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12131 + ... + 12203.

It is an arithmetic number, because the mean of its divisors is an integer number (117660).

2⁸⁸⁸¹⁹¹ is an apocalyptic number.

888191 is a deficient number, since it is larger than the sum of its proper divisors (53089).

888191 is an frugal number, since it uses more digits than its factorization.

888191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 96 counting only the distinct ones).

The product of its digits is 4608, while the sum is 35.

The square root of 888191 is about 942.4388574332. The cubic root of 888191 is about 96.1248015168.

The spelling of 888191 in words is "eight hundred eighty-eight thousand, one hundred ninety-one".