47919 has 4 divisors (see below), whose sum is σ = 63896. Its totient is φ = 31944.

The previous prime is 47917. The next prime is 47933. The reversal of 47919 is 91974.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 47919 - 2¹ = 47917 is a prime.

It is a super-2 number, since 2×47919² = 4592461122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47911) 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 in 3 ways as a sum of consecutive naturals, for example, 7984 + ... + 7989.

It is an arithmetic number, because the mean of its divisors is an integer number (15974).

2⁴⁷⁹¹⁹ is an apocalyptic number.

47919 is a deficient number, since it is larger than the sum of its proper divisors (15977).

47919 is a wasteful number, since it uses less digits than its factorization.

47919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976.

The product of its digits is 2268, while the sum is 30.

The square root of 47919 is about 218.9040885868. The cubic root of 47919 is about 36.3219577402.

The spelling of 47919 in words is "forty-seven thousand, nine hundred nineteen".