542843509 has 8 divisors (see below), whose sum is σ = 615369440. Its totient is φ = 474713136.

The previous prime is 542843503. The next prime is 542843513. The reversal of 542843509 is 905348245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542843509 - 2³ = 542843501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542843501) 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 7 ways as a sum of consecutive naturals, for example, 1098627 + ... + 1099120.

It is an arithmetic number, because the mean of its divisors is an integer number (76921180).

Almost surely, 2^542843509 is an apocalyptic number.

It is an amenable number.

542843509 is a deficient number, since it is larger than the sum of its proper divisors (72525931).

542843509 is a wasteful number, since it uses less digits than its factorization.

542843509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197779.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 542843509 is about 23299.0023176959. The cubic root of 542843509 is about 815.7521298955.

The spelling of 542843509 in words is "five hundred forty-two million, eight hundred forty-three thousand, five hundred nine".