689711 has 4 divisors (see below), whose sum is σ = 752424. Its totient is φ = 627000.

The previous prime is 689699. The next prime is 689713. The reversal of 689711 is 117986.

689711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 689711 - 2¹⁴ = 673327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 689711.

It is not an unprimeable number, because it can be changed into a prime (689713) 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, 31340 + ... + 31361.

It is an arithmetic number, because the mean of its divisors is an integer number (188106).

2⁶⁸⁹⁷¹¹ is an apocalyptic number.

689711 is a deficient number, since it is larger than the sum of its proper divisors (62713).

689711 is a wasteful number, since it uses less digits than its factorization.

689711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62712.

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

The square root of 689711 is about 830.4884105152. The cubic root of 689711 is about 88.3532204739.

It can be divided in two parts, 68 and 9711, that added together give a palindrome (9779).

The spelling of 689711 in words is "six hundred eighty-nine thousand, seven hundred eleven".