838889 has 2 divisors, whose sum is σ = 838890. Its totient is φ = 838888.

The previous prime is 838853. The next prime is 838897. The reversal of 838889 is 988838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469225 + 369664 = 685^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 838889 - 2⁸ = 838633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 838889.

It is not a weakly prime, because it can be changed into another prime (838589) 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 as a sum of consecutive naturals, namely, 419444 + 419445.

It is an arithmetic number, because the mean of its divisors is an integer number (419445).

2⁸³⁸⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

838889 is a deficient number, since it is larger than the sum of its proper divisors (1).

838889 is an equidigital number, since it uses as much as digits as its factorization.

838889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 44.

The square root of 838889 is about 915.9088382585. The cubic root of 838889 is about 94.3122631739.

The spelling of 838889 in words is "eight hundred thirty-eight thousand, eight hundred eighty-nine".