684163453 has 8 divisors (see below), whose sum is σ = 729025272. Its totient is φ = 639814656.

The previous prime is 684163427. The next prime is 684163471. The reversal of 684163453 is 354361486.

684163453 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 4 ways, for example, as 155301444 + 528862009 = 12462^2 + 22997^2 .

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 684163453 - 2¹⁷ = 684032381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684163483) 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, 125500 + ... + 130837.

It is an arithmetic number, because the mean of its divisors is an integer number (91128159).

Almost surely, 2^684163453 is an apocalyptic number.

It is an amenable number.

684163453 is a deficient number, since it is larger than the sum of its proper divisors (44861819).

684163453 is a wasteful number, since it uses less digits than its factorization.

684163453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256511.

The product of its digits is 207360, while the sum is 40.

The square root of 684163453 is about 26156.5183654094. The cubic root of 684163453 is about 881.1569892749.

The spelling of 684163453 in words is "six hundred eighty-four million, one hundred sixty-three thousand, four hundred fifty-three".