47779 has 2 divisors, whose sum is σ = 47780. Its totient is φ = 47778.

The previous prime is 47777. The next prime is 47791. The reversal of 47779 is 97774.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47779 - 2¹ = 47777 is a prime.

Together with 47777, it forms a pair of twin primes.

It is a plaindrome in base 10 and base 14.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (47777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23889 + 23890.

It is an arithmetic number, because the mean of its divisors is an integer number (23890).

2⁴⁷⁷⁷⁹ is an apocalyptic number.

47779 is a deficient number, since it is larger than the sum of its proper divisors (1).

47779 is an equidigital number, since it uses as much as digits as its factorization.

47779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 34.

The square root of 47779 is about 218.5840799326. The cubic root of 47779 is about 36.2865505300.

The spelling of 47779 in words is "forty-seven thousand, seven hundred seventy-nine".