47861 has 8 divisors (see below), whose sum is σ = 55200. Its totient is φ = 41040.

The previous prime is 47857. The next prime is 47869. The reversal of 47861 is 16874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47861 - 2² = 47857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47869) 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 7 ways as a sum of consecutive naturals, for example, 95 + ... + 323.

It is an arithmetic number, because the mean of its divisors is an integer number (6900).

2⁴⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

47861 is a deficient number, since it is larger than the sum of its proper divisors (7339).

47861 is a wasteful number, since it uses less digits than its factorization.

47861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its digits is 1344, while the sum is 26.

The square root of 47861 is about 218.7715703651. The cubic root of 47861 is about 36.3072974171.

The spelling of 47861 in words is "forty-seven thousand, eight hundred sixty-one".