543139609 has 4 divisors (see below), whose sum is σ = 543263104. Its totient is φ = 543016116.

The previous prime is 543139607. The next prime is 543139621. The reversal of 543139609 is 906931345.

543139609 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 543139609 - 2¹ = 543139607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543139607) 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, 54897 + ... + 64030.

It is an arithmetic number, because the mean of its divisors is an integer number (135815776).

Almost surely, 2^543139609 is an apocalyptic number.

It is an amenable number.

543139609 is a deficient number, since it is larger than the sum of its proper divisors (123495).

543139609 is a wasteful number, since it uses less digits than its factorization.

543139609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123494.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 543139609 is about 23305.3558007596. The cubic root of 543139609 is about 815.9004232786.

The spelling of 543139609 in words is "five hundred forty-three million, one hundred thirty-nine thousand, six hundred nine".