543666749 has 4 divisors (see below), whose sum is σ = 575647164. Its totient is φ = 511686336.

The previous prime is 543666737. The next prime is 543666757. The reversal of 543666749 is 947666345.

543666749 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 can be written as a sum of positive squares in 2 ways, for example, as 230128900 + 313537849 = 15170^2 + 17707^2 .

It is a cyclic number.

It is not a de Polignac number, because 543666749 - 2⁴ = 543666733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 543666697 and 543666706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543666449) 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, 15990182 + ... + 15990215.

It is an arithmetic number, because the mean of its divisors is an integer number (143911791).

Almost surely, 2^543666749 is an apocalyptic number.

It is an amenable number.

543666749 is a deficient number, since it is larger than the sum of its proper divisors (31980415).

543666749 is a wasteful number, since it uses less digits than its factorization.

543666749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31980414.

The product of its digits is 3265920, while the sum is 50.

The square root of 543666749 is about 23316.6624755774. The cubic root of 543666749 is about 816.1642932398.

The spelling of 543666749 in words is "five hundred forty-three million, six hundred sixty-six thousand, seven hundred forty-nine".