47031209 has 2 divisors, whose sum is σ = 47031210. Its totient is φ = 47031208.

The previous prime is 47031169. The next prime is 47031217. The reversal of 47031209 is 90213074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46963609 + 67600 = 6853^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 47031209 - 2¹⁶ = 46965673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47031269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23515604 + 23515605.

It is an arithmetic number, because the mean of its divisors is an integer number (23515605).

Almost surely, 2^47031209 is an apocalyptic number.

It is an amenable number.

47031209 is a deficient number, since it is larger than the sum of its proper divisors (1).

47031209 is an equidigital number, since it uses as much as digits as its factorization.

47031209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 47031209 is about 6857.9303729332. The cubic root of 47031209 is about 360.9624682502.

The spelling of 47031209 in words is "forty-seven million, thirty-one thousand, two hundred nine".