839381 has 2 divisors, whose sum is σ = 839382. Its totient is φ = 839380.

The previous prime is 839369. The next prime is 839413. The reversal of 839381 is 183938.

It is an a-pointer prime, because the next prime (839413) can be obtained adding 839381 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 184900 = 809^2 + 430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839381 is a prime.

It is a super-2 number, since 2×839381² = 1409120926322, which contains 22 as substring.

It is a Chen prime.

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 839381.

It is not a weakly prime, because it can be changed into another prime (839351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419690 + 419691.

It is an arithmetic number, because the mean of its divisors is an integer number (419691).

2⁸³⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

839381 is a deficient number, since it is larger than the sum of its proper divisors (1).

839381 is an equidigital number, since it uses as much as digits as its factorization.

839381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 839381 is about 916.1773845714. The cubic root of 839381 is about 94.3306973033.

The spelling of 839381 in words is "eight hundred thirty-nine thousand, three hundred eighty-one".