688469 has 4 divisors (see below), whose sum is σ = 690144. Its totient is φ = 686796.

The previous prime is 688453. The next prime is 688477. The reversal of 688469 is 964886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 688469 - 2⁴ = 688453 is a prime.

It is a super-3 number, since 3×688469³ = 978981363331997127, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 4.

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 688469.

It is not an unprimeable number, because it can be changed into a prime (688669) 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, 254 + ... + 1200.

It is an arithmetic number, because the mean of its divisors is an integer number (172536).

2⁶⁸⁸⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

688469 is a deficient number, since it is larger than the sum of its proper divisors (1675).

688469 is an equidigital number, since it uses as much as digits as its factorization.

688469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its digits is 82944, while the sum is 41.

The square root of 688469 is about 829.7403208233. The cubic root of 688469 is about 88.3001544630.

The spelling of 688469 in words is "six hundred eighty-eight thousand, four hundred sixty-nine".