684495233 has 4 divisors (see below), whose sum is σ = 684547668. Its totient is φ = 684442800.

The previous prime is 684495211. The next prime is 684495241. The reversal of 684495233 is 332594486.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 281971264 + 402523969 = 16792^2 + 20063^2 .

It is a cyclic number.

It is not a de Polignac number, because 684495233 - 2¹⁴ = 684478849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684485233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10583 + ... + 38483.

It is an arithmetic number, because the mean of its divisors is an integer number (171136917).

Almost surely, 2^684495233 is an apocalyptic number.

It is an amenable number.

684495233 is a deficient number, since it is larger than the sum of its proper divisors (52435).

684495233 is a wasteful number, since it uses less digits than its factorization.

684495233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52434.

The product of its digits is 622080, while the sum is 44.

The square root of 684495233 is about 26162.8598016348. The cubic root of 684495233 is about 881.2994031087.

The spelling of 684495233 in words is "six hundred eighty-four million, four hundred ninety-five thousand, two hundred thirty-three".