688567 has 4 divisors (see below), whose sum is σ = 751176. Its totient is φ = 625960.

The previous prime is 688561. The next prime is 688573. The reversal of 688567 is 765886.

688567 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 an interprime number because it is at equal distance from previous prime (688561) and next prime (688573).

It is a cyclic number.

It is not a de Polignac number, because 688567 - 2¹¹ = 686519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688561) 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, 31288 + ... + 31309.

It is an arithmetic number, because the mean of its divisors is an integer number (187794).

2⁶⁸⁸⁵⁶⁷ is an apocalyptic number.

688567 is a deficient number, since it is larger than the sum of its proper divisors (62609).

688567 is a wasteful number, since it uses less digits than its factorization.

688567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62608.

The product of its digits is 80640, while the sum is 40.

The square root of 688567 is about 829.7993733427. The cubic root of 688567 is about 88.3043439543.

The spelling of 688567 in words is "six hundred eighty-eight thousand, five hundred sixty-seven".