543665345 has 4 divisors (see below), whose sum is σ = 652398420. Its totient is φ = 434932272.

The previous prime is 543665341. The next prime is 543665351. The reversal of 543665345 is 543566345.

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 411116176 + 132549169 = 20276^2 + 11513^2 .

It is a cyclic number.

It is not a de Polignac number, because 543665345 - 2² = 543665341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (543665341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54366530 + ... + 54366539.

It is an arithmetic number, because the mean of its divisors is an integer number (163099605).

Almost surely, 2^543665345 is an apocalyptic number.

It is an amenable number.

543665345 is a deficient number, since it is larger than the sum of its proper divisors (108733075).

543665345 is a wasteful number, since it uses less digits than its factorization.

543665345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108733074.

The product of its digits is 648000, while the sum is 41.

The square root of 543665345 is about 23316.6323683331. The cubic root of 543665345 is about 816.1635906675.

The spelling of 543665345 in words is "five hundred forty-three million, six hundred sixty-five thousand, three hundred forty-five".