47171287 has 2 divisors, whose sum is σ = 47171288. Its totient is φ = 47171286.

The previous prime is 47171273. The next prime is 47171297. The reversal of 47171287 is 78217174.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47171287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47171207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23585643 + 23585644.

It is an arithmetic number, because the mean of its divisors is an integer number (23585644).

Almost surely, 2^47171287 is an apocalyptic number.

47171287 is a deficient number, since it is larger than the sum of its proper divisors (1).

47171287 is an equidigital number, since it uses as much as digits as its factorization.

47171287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21952, while the sum is 37.

The square root of 47171287 is about 6868.1356276649. The cubic root of 47171287 is about 361.3204772238.

The spelling of 47171287 in words is "forty-seven million, one hundred seventy-one thousand, two hundred eighty-seven".