47791 has 2 divisors, whose sum is σ = 47792. Its totient is φ = 47790.

The previous prime is 47779. The next prime is 47797. The reversal of 47791 is 19774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47791 - 2⁹ = 47279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23895 + 23896.

It is an arithmetic number, because the mean of its divisors is an integer number (23896).

2⁴⁷⁷⁹¹ is an apocalyptic number.

47791 is a deficient number, since it is larger than the sum of its proper divisors (1).

47791 is an equidigital number, since it uses as much as digits as its factorization.

47791 is an odious number, because the sum of its binary digits is odd.

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

The square root of 47791 is about 218.6115276009. The cubic root of 47791 is about 36.2895881418.

It can be divided in two parts, 47 and 791, that added together give a palindrome (838).

The spelling of 47791 in words is "forty-seven thousand, seven hundred ninety-one".