689770 has 16 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 263824.

The previous prime is 689761. The next prime is 689771. The reversal of 689770 is 77986.

It is not an unprimeable number, because it can be changed into a prime (689771) by changing a digit.

689770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 1729.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2⁶⁸⁹⁷⁷⁰ is an apocalyptic number.

689770 is a deficient number, since it is larger than the sum of its proper divisors (606230).

689770 is a wasteful number, since it uses less digits than its factorization.

689770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 689770 is about 830.5239310219. The cubic root of 689770 is about 88.3557397374.

The spelling of 689770 in words is "six hundred eighty-nine thousand, seven hundred seventy".