688497 has 4 divisors (see below), whose sum is σ = 918000. Its totient is φ = 458996.

The previous prime is 688477. The next prime is 688511. The reversal of 688497 is 794886.

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 a cyclic number.

It is not a de Polignac number, because 688497 - 2⁶ = 688433 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688497.

It is not an unprimeable number, because it can be changed into a prime (688447) 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, 114747 + ... + 114752.

It is an arithmetic number, because the mean of its divisors is an integer number (229500).

2⁶⁸⁸⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

688497 is a deficient number, since it is larger than the sum of its proper divisors (229503).

688497 is a wasteful number, since it uses less digits than its factorization.

688497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229502.

The product of its digits is 96768, while the sum is 42.

The square root of 688497 is about 829.7571934006. The cubic root of 688497 is about 88.3013515011.

The spelling of 688497 in words is "six hundred eighty-eight thousand, four hundred ninety-seven".