687197 has 8 divisors (see below), whose sum is σ = 792576. Its totient is φ = 583632.

The previous prime is 687179. The next prime is 687223. The reversal of 687197 is 791786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 687197 - 2¹⁰ = 686173 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 687197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687107) 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, 503 + ... + 1275.

It is an arithmetic number, because the mean of its divisors is an integer number (99072).

2⁶⁸⁷¹⁹⁷ is an apocalyptic number.

It is an amenable number.

687197 is a deficient number, since it is larger than the sum of its proper divisors (105379).

687197 is a wasteful number, since it uses less digits than its factorization.

687197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its digits is 21168, while the sum is 38.

The square root of 687197 is about 828.9734615776. The cubic root of 687197 is about 88.2457404712.

The spelling of 687197 in words is "six hundred eighty-seven thousand, one hundred ninety-seven".