87947 has 4 divisors (see below), whose sum is σ = 90816. Its totient is φ = 85080.

The previous prime is 87943. The next prime is 87959. The reversal of 87947 is 74978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74978 = 2 ⋅37489.

It is a cyclic number.

It is not a de Polignac number, because 87947 - 2² = 87943 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87947.

It is not an unprimeable number, because it can be changed into a prime (87943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (22704).

2⁸⁷⁹⁴⁷ is an apocalyptic number.

87947 is a deficient number, since it is larger than the sum of its proper divisors (2869).

87947 is a wasteful number, since it uses less digits than its factorization.

87947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868.

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

The square root of 87947 is about 296.5585945475. The cubic root of 87947 is about 44.4706704011.

The spelling of 87947 in words is "eighty-seven thousand, nine hundred forty-seven".