47785009 has 4 divisors (see below), whose sum is σ = 48360816. Its totient is φ = 47209204.

The previous prime is 47784949. The next prime is 47785033. The reversal of 47785009 is 90058774.

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 47785009 - 2⁷ = 47784881 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47785609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287779 + ... + 287944.

It is an arithmetic number, because the mean of its divisors is an integer number (12090204).

Almost surely, 2^47785009 is an apocalyptic number.

It is an amenable number.

47785009 is a deficient number, since it is larger than the sum of its proper divisors (575807).

47785009 is an equidigital number, since it uses as much as digits as its factorization.

47785009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575806.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 47785009 is about 6912.6701787370. The cubic root of 47785009 is about 362.8807167768.

The spelling of 47785009 in words is "forty-seven million, seven hundred eighty-five thousand, nine".