47815009 has 4 divisors (see below), whose sum is σ = 52161840. Its totient is φ = 43468180.

The previous prime is 47815007. The next prime is 47815013. The reversal of 47815009 is 90051874.

It is a happy number.

47815009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47815009 - 2¹ = 47815007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47815003) 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 3 ways as a sum of consecutive naturals, for example, 2173399 + ... + 2173420.

It is an arithmetic number, because the mean of its divisors is an integer number (13040460).

Almost surely, 2^47815009 is an apocalyptic number.

It is an amenable number.

47815009 is a deficient number, since it is larger than the sum of its proper divisors (4346831).

47815009 is a wasteful number, since it uses less digits than its factorization.

47815009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346830.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 47815009 is about 6914.8397667625. The cubic root of 47815009 is about 362.9566411745.

The spelling of 47815009 in words is "forty-seven million, eight hundred fifteen thousand, nine".