1684543653 has 12 divisors (see below), whose sum is σ = 2620401420. Its totient is φ = 1036642176.

The previous prime is 1684543631. The next prime is 1684543669. The reversal of 1684543653 is 3563454861.

1684543653 is a `hidden beast` number, since 168 + 4 + 5 + 436 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130370724 + 1554172929 = 11418^2 + 39423^2 .

It is not a de Polignac number, because 1684543653 - 2¹⁴ = 1684527269 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1684543599 and 1684543608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684543603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7198788 + ... + 7199021.

It is an arithmetic number, because the mean of its divisors is an integer number (218366785).

Almost surely, 2^1684543653 is an apocalyptic number.

1684543653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1684543653 is a deficient number, since it is larger than the sum of its proper divisors (935857767).

1684543653 is a wasteful number, since it uses less digits than its factorization.

1684543653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14397828 (or 14397825 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 1684543653 is about 41043.1925293343. The cubic root of 1684543653 is about 1189.8551368984.

The spelling of 1684543653 in words is "one billion, six hundred eighty-four million, five hundred forty-three thousand, six hundred fifty-three".