686497 has 8 divisors (see below), whose sum is σ = 793152. Its totient is φ = 582000.

The previous prime is 686479. The next prime is 686503. The reversal of 686497 is 794686.

686497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 686497 - 2¹⁹ = 162209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686417) 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, 222 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (99144).

2⁶⁸⁶⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

686497 is a deficient number, since it is larger than the sum of its proper divisors (106655).

686497 is a wasteful number, since it uses less digits than its factorization.

686497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079.

The product of its digits is 72576, while the sum is 40.

The square root of 686497 is about 828.5511450719. The cubic root of 686497 is about 88.2157670165.

The spelling of 686497 in words is "six hundred eighty-six thousand, four hundred ninety-seven".