47917 has 2 divisors, whose sum is σ = 47918. Its totient is φ = 47916.

The previous prime is 47911. The next prime is 47933. The reversal of 47917 is 71974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32041 + 15876 = 179^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 47917 - 2¹¹ = 45869 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23958 + 23959.

It is an arithmetic number, because the mean of its divisors is an integer number (23959).

2⁴⁷⁹¹⁷ is an apocalyptic number.

It is an amenable number.

47917 is a deficient number, since it is larger than the sum of its proper divisors (1).

47917 is an equidigital number, since it uses as much as digits as its factorization.

47917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 28.

The square root of 47917 is about 218.8995203284. The cubic root of 47917 is about 36.3214524088.

It can be divided in two parts, 479 and 17, that added together give a triangular number (496 = T₃₁).

The spelling of 47917 in words is "forty-seven thousand, nine hundred seventeen".