47005009 has 2 divisors, whose sum is σ = 47005010. Its totient is φ = 47005008.

The previous prime is 47004973. The next prime is 47005019. The reversal of 47005009 is 90050074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44182609 + 2822400 = 6647^2 + 1680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47005009 is a prime.

It is not a weakly prime, because it can be changed into another prime (47005019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23502504 + 23502505.

It is an arithmetic number, because the mean of its divisors is an integer number (23502505).

Almost surely, 2^47005009 is an apocalyptic number.

It is an amenable number.

47005009 is a deficient number, since it is larger than the sum of its proper divisors (1).

47005009 is an equidigital number, since it uses as much as digits as its factorization.

47005009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 47005009 is about 6856.0199095394. The cubic root of 47005009 is about 360.8954278491.

The spelling of 47005009 in words is "forty-seven million, five thousand, nine".