684697 has 8 divisors (see below), whose sum is σ = 761600. Its totient is φ = 611280.

The previous prime is 684683. The next prime is 684713. The reversal of 684697 is 796486.

684697 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 684697 - 2⁷ = 684569 is a prime.

It is a Duffinian number.

684697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (684617) 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, 447 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (95200).

2⁶⁸⁴⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

684697 is a deficient number, since it is larger than the sum of its proper divisors (76903).

684697 is a wasteful number, since it uses less digits than its factorization.

684697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

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

The square root of 684697 is about 827.4641986213. The cubic root of 684697 is about 88.1385987431.

The spelling of 684697 in words is "six hundred eighty-four thousand, six hundred ninety-seven".