8743987 has 4 divisors (see below), whose sum is σ = 9993136. Its totient is φ = 7494840.

The previous prime is 8743981. The next prime is 8743991. The reversal of 8743987 is 7893478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7893478 = 2 ⋅3946739.

It is a cyclic number.

It is not a de Polignac number, because 8743987 - 2²³ = 355379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8743981) 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, 624564 + ... + 624577.

It is an arithmetic number, because the mean of its divisors is an integer number (2498284).

Almost surely, 2^8743987 is an apocalyptic number.

8743987 is a deficient number, since it is larger than the sum of its proper divisors (1249149).

8743987 is a wasteful number, since it uses less digits than its factorization.

8743987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249148.

The product of its digits is 338688, while the sum is 46.

The square root of 8743987 is about 2957.0233343685. The cubic root of 8743987 is about 206.0170517195.

It can be divided in two parts, 8743 and 987, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 8743987 in words is "eight million, seven hundred forty-three thousand, nine hundred eighty-seven".