689547 has 4 divisors (see below), whose sum is σ = 919400. Its totient is φ = 459696.

The previous prime is 689509. The next prime is 689551. The reversal of 689547 is 745986.

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

It is not a de Polignac number, because 689547 - 2⁸ = 689291 is a prime.

It is a D-number.

It is a Duffinian number.

689547 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (689587) 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, 114922 + ... + 114927.

It is an arithmetic number, because the mean of its divisors is an integer number (229850).

2⁶⁸⁹⁵⁴⁷ is an apocalyptic number.

689547 is a deficient number, since it is larger than the sum of its proper divisors (229853).

689547 is a wasteful number, since it uses less digits than its factorization.

689547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229852.

The product of its digits is 60480, while the sum is 39.

The square root of 689547 is about 830.3896675658. The cubic root of 689547 is about 88.3462170204.

The spelling of 689547 in words is "six hundred eighty-nine thousand, five hundred forty-seven".