838891 has 4 divisors (see below), whose sum is σ = 865984. Its totient is φ = 811800.

The previous prime is 838889. The next prime is 838897. The reversal of 838891 is 198838.

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 838891 - 2¹ = 838889 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 838891.

It is not an unprimeable number, because it can be changed into a prime (838897) 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, 13500 + ... + 13561.

It is an arithmetic number, because the mean of its divisors is an integer number (216496).

2⁸³⁸⁸⁹¹ is an apocalyptic number.

838891 is a deficient number, since it is larger than the sum of its proper divisors (27093).

838891 is a wasteful number, since it uses less digits than its factorization.

838891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27092.

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

The square root of 838891 is about 915.9099300695. The cubic root of 838891 is about 94.3123381240.

The spelling of 838891 in words is "eight hundred thirty-eight thousand, eight hundred ninety-one".