6988871 has 2 divisors, whose sum is σ = 6988872. Its totient is φ = 6988870.

The previous prime is 6988847. The next prime is 6988873. The reversal of 6988871 is 1788896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6988871 - 2¹⁰ = 6987847 is a prime.

Together with 6988873, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6988873) 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 as a sum of consecutive naturals, namely, 3494435 + 3494436.

It is an arithmetic number, because the mean of its divisors is an integer number (3494436).

Almost surely, 2^6988871 is an apocalyptic number.

6988871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988871 is an equidigital number, since it uses as much as digits as its factorization.

6988871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 6988871 is about 2643.6472911491. The cubic root of 6988871 is about 191.1916882617.

The spelling of 6988871 in words is "six million, nine hundred eighty-eight thousand, eight hundred seventy-one".