688501 has 4 divisors (see below), whose sum is σ = 751104. Its totient is φ = 625900.

The previous prime is 688477. The next prime is 688511. The reversal of 688501 is 105886.

It is a happy number.

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.

It is not a de Polignac number, because 688501 - 2¹¹ = 686453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688511) 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, 31285 + ... + 31306.

It is an arithmetic number, because the mean of its divisors is an integer number (187776).

2⁶⁸⁸⁵⁰¹ is an apocalyptic number.

It is an amenable number.

688501 is a deficient number, since it is larger than the sum of its proper divisors (62603).

688501 is a wasteful number, since it uses less digits than its factorization.

688501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62602.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 688501 is about 829.7596037407. The cubic root of 688501 is about 88.3015225039.

The spelling of 688501 in words is "six hundred eighty-eight thousand, five hundred one".