689171 has 4 divisors (see below), whose sum is σ = 787632. Its totient is φ = 590712.

The previous prime is 689167. The next prime is 689201. The reversal of 689171 is 171986.

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

It is a cyclic number.

It is not a de Polignac number, because 689171 - 2² = 689167 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689171.

It is not an unprimeable number, because it can be changed into a prime (689131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49220 + ... + 49233.

It is an arithmetic number, because the mean of its divisors is an integer number (196908).

2⁶⁸⁹¹⁷¹ is an apocalyptic number.

689171 is a deficient number, since it is larger than the sum of its proper divisors (98461).

689171 is an equidigital number, since it uses as much as digits as its factorization.

689171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98460.

The product of its digits is 3024, while the sum is 32.

The square root of 689171 is about 830.1632369601. The cubic root of 689171 is about 88.3301561295.

The spelling of 689171 in words is "six hundred eighty-nine thousand, one hundred seventy-one".