684231 has 4 divisors (see below), whose sum is σ = 912312. Its totient is φ = 456152.

The previous prime is 684221. The next prime is 684239. The reversal of 684231 is 132486.

It is a happy number.

684231 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.

It is a cyclic number.

It is not a de Polignac number, because 684231 - 2⁹ = 683719 is a prime.

It is a super-2 number, since 2×684231² = 936344122722, which contains 22 as substring.

It is a D-number.

684231 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684231.

It is not an unprimeable number, because it can be changed into a prime (684239) 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, 114036 + ... + 114041.

It is an arithmetic number, because the mean of its divisors is an integer number (228078).

2⁶⁸⁴²³¹ is an apocalyptic number.

684231 is a deficient number, since it is larger than the sum of its proper divisors (228081).

684231 is a wasteful number, since it uses less digits than its factorization.

684231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228080.

The product of its digits is 1152, while the sum is 24.

The square root of 684231 is about 827.1825675146. The cubic root of 684231 is about 88.1185987001.

The spelling of 684231 in words is "six hundred eighty-four thousand, two hundred thirty-one".