839897 has 2 divisors, whose sum is σ = 839898. Its totient is φ = 839896.

The previous prime is 839887. The next prime is 839899. The reversal of 839897 is 798938.

839897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839056 + 841 = 916^2 + 29^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839897 is a prime.

Together with 839899, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419948 + 419949.

It is an arithmetic number, because the mean of its divisors is an integer number (419949).

2⁸³⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

839897 is a deficient number, since it is larger than the sum of its proper divisors (1).

839897 is an equidigital number, since it uses as much as digits as its factorization.

839897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 839897 is about 916.4589461618. The cubic root of 839897 is about 94.3500229211.

The spelling of 839897 in words is "eight hundred thirty-nine thousand, eight hundred ninety-seven".