540243009 has 12 divisors (see below), whose sum is σ = 783619200. Its totient is φ = 358653624.

The previous prime is 540242993. The next prime is 540243037. The reversal of 540243009 is 900342045.

It is not a de Polignac number, because 540243009 - 2⁴ = 540242993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (540243079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123429 + ... + 127730.

It is an arithmetic number, because the mean of its divisors is an integer number (65301600).

Almost surely, 2^540243009 is an apocalyptic number.

It is an amenable number.

540243009 is a deficient number, since it is larger than the sum of its proper divisors (243376191).

540243009 is a wasteful number, since it uses less digits than its factorization.

540243009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251404 (or 251401 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 540243009 is about 23243.1282102905. The cubic root of 540243009 is about 814.4474199762.

The spelling of 540243009 in words is "five hundred forty million, two hundred forty-three thousand, nine".