689741 has 8 divisors (see below), whose sum is σ = 786744. Its totient is φ = 599040.

The previous prime is 689723. The next prime is 689761. The reversal of 689741 is 147986.

It can be written as a sum of positive squares in 4 ways, for example, as 841 + 688900 = 29^2 + 830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689741 - 2¹⁰ = 688717 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (98343).

2⁶⁸⁹⁷⁴¹ is an apocalyptic number.

It is an amenable number.

689741 is a deficient number, since it is larger than the sum of its proper divisors (97003).

689741 is a wasteful number, since it uses less digits than its factorization.

689741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151.

The product of its digits is 12096, while the sum is 35.

The square root of 689741 is about 830.5064719796. The cubic root of 689741 is about 88.3545014733.

The spelling of 689741 in words is "six hundred eighty-nine thousand, seven hundred forty-one".