684497 has 6 divisors (see below), whose sum is σ = 752514. Its totient is φ = 622160.

The previous prime is 684493. The next prime is 684527. The reversal of 684497 is 794486.

It is a happy number.

684497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 450241 + 234256 = 671^2 + 484^2 .

It is not a de Polignac number, because 684497 - 2² = 684493 is a prime.

It is a super-2 number, since 2×684497² = 937072286018, which contains 22 as substring.

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 684497.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2708 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (125419).

2⁶⁸⁴⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

684497 is a deficient number, since it is larger than the sum of its proper divisors (68017).

684497 is a wasteful number, since it uses less digits than its factorization.

684497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679 (or 5668 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 684497 is about 827.3433386448. The cubic root of 684497 is about 88.1300161456.

The spelling of 684497 in words is "six hundred eighty-four thousand, four hundred ninety-seven".