689461 has 2 divisors, whose sum is σ = 689462. Its totient is φ = 689460.

The previous prime is 689459. The next prime is 689467. The reversal of 689461 is 164986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 8836 = 825^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 689461 - 2¹ = 689459 is a prime.

Together with 689459, it forms a pair of twin primes.

689461 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344730 + 344731.

It is an arithmetic number, because the mean of its divisors is an integer number (344731).

2⁶⁸⁹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

689461 is a deficient number, since it is larger than the sum of its proper divisors (1).

689461 is an equidigital number, since it uses as much as digits as its factorization.

689461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 689461 is about 830.3378830332. The cubic root of 689461 is about 88.3425440338.

The spelling of 689461 in words is "six hundred eighty-nine thousand, four hundred sixty-one".