689441 has 2 divisors, whose sum is σ = 689442. Its totient is φ = 689440.

The previous prime is 689431. The next prime is 689459. The reversal of 689441 is 144986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 279841 = 640^2 + 529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689441 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 689398 and 689407.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689441.

It is not a weakly prime, because it can be changed into another prime (689411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344720 + 344721.

It is an arithmetic number, because the mean of its divisors is an integer number (344721).

2⁶⁸⁹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

689441 is a deficient number, since it is larger than the sum of its proper divisors (1).

689441 is an equidigital number, since it uses as much as digits as its factorization.

689441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 689441 is about 830.3258396557. The cubic root of 689441 is about 88.3416898071.

The spelling of 689441 in words is "six hundred eighty-nine thousand, four hundred forty-one".