42547000609 has 2 divisors, whose sum is σ = 42547000610. Its totient is φ = 42547000608.

The previous prime is 42547000607. The next prime is 42547000663. The reversal of 42547000609 is 90600074524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42528750625 + 18249984 = 206225^2 + 4272^2 .

It is a cyclic number.

It is not a de Polignac number, because 42547000609 - 2¹ = 42547000607 is a prime.

Together with 42547000607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42547000603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21273500304 + 21273500305.

It is an arithmetic number, because the mean of its divisors is an integer number (21273500305).

Almost surely, 2^42547000609 is an apocalyptic number.

It is an amenable number.

42547000609 is a deficient number, since it is larger than the sum of its proper divisors (1).

42547000609 is an equidigital number, since it uses as much as digits as its factorization.

42547000609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 42547000609 in words is "forty-two billion, five hundred forty-seven million, six hundred nine", and thus it is an aban number.