689385 has 8 divisors (see below), whose sum is σ = 1103040. Its totient is φ = 367664.

The previous prime is 689383. The next prime is 689389. The reversal of 689385 is 583986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689385 - 2¹ = 689383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22965 + ... + 22994.

It is an arithmetic number, because the mean of its divisors is an integer number (137880).

2⁶⁸⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

689385 is a deficient number, since it is larger than the sum of its proper divisors (413655).

689385 is a wasteful number, since it uses less digits than its factorization.

689385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45967.

The product of its digits is 51840, while the sum is 39.

The square root of 689385 is about 830.2921172696. The cubic root of 689385 is about 88.3392978845.

It can be divided in two parts, 68 and 9385, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 689385 in words is "six hundred eighty-nine thousand, three hundred eighty-five".