47317547 has 2 divisors, whose sum is σ = 47317548. Its totient is φ = 47317546.

The previous prime is 47317537. The next prime is 47317549. The reversal of 47317547 is 74571374.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47317547 - 2¹² = 47313451 is a prime.

Together with 47317549, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47317547.

It is not a weakly prime, because it can be changed into another prime (47317549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23658773 + 23658774.

It is an arithmetic number, because the mean of its divisors is an integer number (23658774).

Almost surely, 2^47317547 is an apocalyptic number.

47317547 is a deficient number, since it is larger than the sum of its proper divisors (1).

47317547 is an equidigital number, since it uses as much as digits as its factorization.

47317547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82320, while the sum is 38.

The square root of 47317547 is about 6878.7751089856. The cubic root of 47317547 is about 361.6935304880.

The spelling of 47317547 in words is "forty-seven million, three hundred seventeen thousand, five hundred forty-seven".