689611 has 4 divisors (see below), whose sum is σ = 742672. Its totient is φ = 636552.

The previous prime is 689603. The next prime is 689621. The reversal of 689611 is 116986.

It is a happy number.

689611 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 a cyclic number.

It is not a de Polignac number, because 689611 - 2³ = 689603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689621) 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, 26511 + ... + 26536.

It is an arithmetic number, because the mean of its divisors is an integer number (185668).

2⁶⁸⁹⁶¹¹ is an apocalyptic number.

689611 is a deficient number, since it is larger than the sum of its proper divisors (53061).

689611 is a wasteful number, since it uses less digits than its factorization.

689611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53060.

The product of its digits is 2592, while the sum is 31.

The square root of 689611 is about 830.4282027966. The cubic root of 689611 is about 88.3489502075.

The spelling of 689611 in words is "six hundred eighty-nine thousand, six hundred eleven".