47987 has 4 divisors (see below), whose sum is σ = 49056. Its totient is φ = 46920.

The previous prime is 47981. The next prime is 48017. The reversal of 47987 is 78974.

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

It is a cyclic number.

It is not a de Polignac number, because 47987 - 2¹² = 43891 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 47987.

It is not an unprimeable number, because it can be changed into a prime (47981) 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, 464 + ... + 557.

It is an arithmetic number, because the mean of its divisors is an integer number (12264).

2⁴⁷⁹⁸⁷ is an apocalyptic number.

47987 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

47987 is a deficient number, since it is larger than the sum of its proper divisors (1069).

47987 is a wasteful number, since it uses less digits than its factorization.

47987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its digits is 14112, while the sum is 35.

The square root of 47987 is about 219.0593526878. The cubic root of 47987 is about 36.3391306482.

The spelling of 47987 in words is "forty-seven thousand, nine hundred eighty-seven".