684897 has 4 divisors (see below), whose sum is σ = 913200. Its totient is φ = 456596.

The previous prime is 684889. The next prime is 684923. The reversal of 684897 is 798486.

It is a happy number.

684897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 684897 - 2³ = 684889 is a prime.

It is a D-number.

684897 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (684857) 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, 114147 + ... + 114152.

It is an arithmetic number, because the mean of its divisors is an integer number (228300).

2⁶⁸⁴⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

684897 is a deficient number, since it is larger than the sum of its proper divisors (228303).

684897 is a wasteful number, since it uses less digits than its factorization.

684897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228302.

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

The square root of 684897 is about 827.5850409475. The cubic root of 684897 is about 88.1471796695.

The spelling of 684897 in words is "six hundred eighty-four thousand, eight hundred ninety-seven".