540305643 has 4 divisors (see below), whose sum is σ = 720407528. Its totient is φ = 360203760.

The previous prime is 540305639. The next prime is 540305659. The reversal of 540305643 is 346503045.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 540305643 - 2² = 540305639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540305643.

It is not an unprimeable number, because it can be changed into a prime (540305663) 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, 90050938 + ... + 90050943.

It is an arithmetic number, because the mean of its divisors is an integer number (180101882).

Almost surely, 2^540305643 is an apocalyptic number.

540305643 is a deficient number, since it is larger than the sum of its proper divisors (180101885).

540305643 is a wasteful number, since it uses less digits than its factorization.

540305643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180101884.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 540305643 is about 23244.4755372110. The cubic root of 540305643 is about 814.4788935461.

Adding to 540305643 its reverse (346503045), we get a palindrome (886808688).

The spelling of 540305643 in words is "five hundred forty million, three hundred five thousand, six hundred forty-three".