47509009 has 2 divisors, whose sum is σ = 47509010. Its totient is φ = 47509008.

The previous prime is 47509003. The next prime is 47509039. The reversal of 47509009 is 90090574.

47509009 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., 25979409 + 21529600 = 5097^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 47509009 - 2⁵ = 47508977 is a prime.

It is not a weakly prime, because it can be changed into another prime (47509003) 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 as a sum of consecutive naturals, namely, 23754504 + 23754505.

It is an arithmetic number, because the mean of its divisors is an integer number (23754505).

Almost surely, 2^47509009 is an apocalyptic number.

It is an amenable number.

47509009 is a deficient number, since it is larger than the sum of its proper divisors (1).

47509009 is an equidigital number, since it uses as much as digits as its factorization.

47509009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 47509009 is about 6892.6779266117. The cubic root of 47509009 is about 362.1807167235.

The spelling of 47509009 in words is "forty-seven million, five hundred nine thousand, nine".