47947 has 2 divisors, whose sum is σ = 47948. Its totient is φ = 47946.

The previous prime is 47939. The next prime is 47951. The reversal of 47947 is 74974.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47947 - 2³ = 47939 is a prime.

47947 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (47917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23973 + 23974.

It is an arithmetic number, because the mean of its divisors is an integer number (23974).

2⁴⁷⁹⁴⁷ is an apocalyptic number.

47947 is a deficient number, since it is larger than the sum of its proper divisors (1).

47947 is an equidigital number, since it uses as much as digits as its factorization.

47947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 47947 is about 218.9680341968. The cubic root of 47947 is about 36.3290309039.

The spelling of 47947 in words is "forty-seven thousand, nine hundred forty-seven".