888391 has 4 divisors (see below), whose sum is σ = 1015312. Its totient is φ = 761472.

The previous prime is 888389. The next prime is 888397. The reversal of 888391 is 193888.

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 888391 - 2¹ = 888389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 888391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (888397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63450 + ... + 63463.

It is an arithmetic number, because the mean of its divisors is an integer number (253828).

2⁸⁸⁸³⁹¹ is an apocalyptic number.

888391 is a deficient number, since it is larger than the sum of its proper divisors (126921).

888391 is a wasteful number, since it uses less digits than its factorization.

888391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126920.

The product of its digits is 13824, while the sum is 37.

The square root of 888391 is about 942.5449591399. The cubic root of 888391 is about 96.1320160001.

The spelling of 888391 in words is "eight hundred eighty-eight thousand, three hundred ninety-one".