47045209 has 4 divisors (see below), whose sum is σ = 47078416. Its totient is φ = 47012004.

The previous prime is 47045179. The next prime is 47045237. The reversal of 47045209 is 90254074.

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 47045209 - 2¹³ = 47037017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47045249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14379 + ... + 17344.

It is an arithmetic number, because the mean of its divisors is an integer number (11769604).

Almost surely, 2^47045209 is an apocalyptic number.

It is an amenable number.

47045209 is a deficient number, since it is larger than the sum of its proper divisors (33207).

47045209 is a wasteful number, since it uses less digits than its factorization.

47045209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33206.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 47045209 is about 6858.9510130923. The cubic root of 47045209 is about 360.9982811591.

The spelling of 47045209 in words is "forty-seven million, forty-five thousand, two hundred nine".