47540209 has 2 divisors, whose sum is σ = 47540210. Its totient is φ = 47540208.

The previous prime is 47540203. The next prime is 47540219. The reversal of 47540209 is 90204574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 13667809 = 5820^2 + 3697^2 .

It is a cyclic number.

It is not a de Polignac number, because 47540209 - 2³ = 47540201 is a prime.

It is not a weakly prime, because it can be changed into another prime (47540201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23770104 + 23770105.

It is an arithmetic number, because the mean of its divisors is an integer number (23770105).

Almost surely, 2^47540209 is an apocalyptic number.

It is an amenable number.

47540209 is a deficient number, since it is larger than the sum of its proper divisors (1).

47540209 is an equidigital number, since it uses as much as digits as its factorization.

47540209 is an evil number, because the sum of its binary digits is even.

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

The square root of 47540209 is about 6894.9408264321. The cubic root of 47540209 is about 362.2599828518.

The spelling of 47540209 in words is "forty-seven million, five hundred forty thousand, two hundred nine".