542566009 has 2 divisors, whose sum is σ = 542566010. Its totient is φ = 542566008.

The previous prime is 542566007. The next prime is 542566027. The reversal of 542566009 is 900665245.

542566009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503778025 + 38787984 = 22445^2 + 6228^2 .

It is a cyclic number.

It is not a de Polignac number, because 542566009 - 2¹ = 542566007 is a prime.

Together with 542566007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (542566001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271283004 + 271283005.

It is an arithmetic number, because the mean of its divisors is an integer number (271283005).

Almost surely, 2^542566009 is an apocalyptic number.

It is an amenable number.

542566009 is a deficient number, since it is larger than the sum of its proper divisors (1).

542566009 is an equidigital number, since it uses as much as digits as its factorization.

542566009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 542566009 is about 23293.0463658148. The cubic root of 542566009 is about 815.6131028422.

The spelling of 542566009 in words is "five hundred forty-two million, five hundred sixty-six thousand, nine".