839881 has 4 divisors (see below), whose sum is σ = 959872. Its totient is φ = 719892.

The previous prime is 839879. The next prime is 839887. The reversal of 839881 is 188938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 839881 - 2¹ = 839879 is a prime.

It is a super-2 number, since 2×839881² = 1410800188322, which contains 22 as substring.

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 839881.

It is not an unprimeable number, because it can be changed into a prime (839887) 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, 59985 + ... + 59998.

It is an arithmetic number, because the mean of its divisors is an integer number (239968).

2⁸³⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

839881 is a deficient number, since it is larger than the sum of its proper divisors (119991).

839881 is a wasteful number, since it uses less digits than its factorization.

839881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119990.

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

The square root of 839881 is about 916.4502168694. The cubic root of 839881 is about 94.3494237960.

The spelling of 839881 in words is "eight hundred thirty-nine thousand, eight hundred eighty-one".