841689 has 12 divisors (see below), whose sum is σ = 1245972. Its totient is φ = 547200.

The previous prime is 841663. The next prime is 841691. The reversal of 841689 is 986148.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 233289 + 608400 = 483^2 + 780^2 .

It is a de Polignac number, because none of the positive numbers 2^k-841689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (841189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (103831).

2⁸⁴¹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

841689 is a deficient number, since it is larger than the sum of its proper divisors (404283).

841689 is a wasteful number, since it uses less digits than its factorization.

841689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328 (or 2325 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 841689 is about 917.4361013171. The cubic root of 841689 is about 94.4170768326.

The spelling of 841689 in words is "eight hundred forty-one thousand, six hundred eighty-nine".