689841 has 6 divisors (see below), whose sum is σ = 996450. Its totient is φ = 459888.

The previous prime is 689831. The next prime is 689851. The reversal of 689841 is 148986.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (689831) and next prime (689851).

It can be written as a sum of positive squares in only one way, i.e., 680625 + 9216 = 825^2 + 96^2 .

It is not a de Polignac number, because 689841 - 2⁷ = 689713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689796 and 689805.

It is not an unprimeable number, because it can be changed into a prime (689831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38316 + ... + 38333.

It is an arithmetic number, because the mean of its divisors is an integer number (166075).

2⁶⁸⁹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

689841 is a deficient number, since it is larger than the sum of its proper divisors (306609).

689841 is a wasteful number, since it uses less digits than its factorization.

689841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76655 (or 76652 counting only the distinct ones).

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

The square root of 689841 is about 830.5666740244. The cubic root of 689841 is about 88.3587712031.

The spelling of 689841 in words is "six hundred eighty-nine thousand, eight hundred forty-one".