839081 has 4 divisors (see below), whose sum is σ = 841812. Its totient is φ = 836352.

The previous prime is 839071. The next prime is 839087. The reversal of 839081 is 180938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180938 = 2 ⋅90469.

It can be written as a sum of positive squares in 2 ways, for example, as 336400 + 502681 = 580^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 839081 - 2¹⁴ = 822697 is a prime.

It is a super-2 number, since 2×839081² = 1408113849122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839087) 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, 836 + ... + 1541.

It is an arithmetic number, because the mean of its divisors is an integer number (210453).

2⁸³⁹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

839081 is a deficient number, since it is larger than the sum of its proper divisors (2731).

839081 is a wasteful number, since it uses less digits than its factorization.

839081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 839081 is about 916.0136461866. The cubic root of 839081 is about 94.3194578378.

The spelling of 839081 in words is "eight hundred thirty-nine thousand, eighty-one".