6987143 has 4 divisors (see below), whose sum is σ = 7025928. Its totient is φ = 6948360.

The previous prime is 6987139. The next prime is 6987163. The reversal of 6987143 is 3417896.

6987143 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6987143 - 2² = 6987139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6987097 and 6987106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19121 + ... + 19482.

It is an arithmetic number, because the mean of its divisors is an integer number (1756482).

Almost surely, 2^6987143 is an apocalyptic number.

6987143 is a deficient number, since it is larger than the sum of its proper divisors (38785).

6987143 is a wasteful number, since it uses less digits than its factorization.

6987143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38784.

The product of its digits is 36288, while the sum is 38.

The square root of 6987143 is about 2643.3204497374. The cubic root of 6987143 is about 191.1759295662.

The spelling of 6987143 in words is "six million, nine hundred eighty-seven thousand, one hundred forty-three".