689573 has 4 divisors (see below), whose sum is σ = 696780. Its totient is φ = 682368.

The previous prime is 689561. The next prime is 689581. The reversal of 689573 is 375986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 494209 = 442^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 689573 - 2⁶ = 689509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3458 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (174195).

2⁶⁸⁹⁵⁷³ is an apocalyptic number.

It is an amenable number.

689573 is a deficient number, since it is larger than the sum of its proper divisors (7207).

689573 is an equidigital number, since it uses as much as digits as its factorization.

689573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206.

The product of its digits is 45360, while the sum is 38.

The square root of 689573 is about 830.4053227190. The cubic root of 689573 is about 88.3473273980.

The spelling of 689573 in words is "six hundred eighty-nine thousand, five hundred seventy-three".