6988879 has 2 divisors, whose sum is σ = 6988880. Its totient is φ = 6988878.

The previous prime is 6988873. The next prime is 6988907. The reversal of 6988879 is 9788896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6988879 - 2³ = 6988871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6988871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494439 + 3494440.

It is an arithmetic number, because the mean of its divisors is an integer number (3494440).

Almost surely, 2^6988879 is an apocalyptic number.

6988879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988879 is an equidigital number, since it uses as much as digits as its factorization.

6988879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 6988879 is about 2643.6488042098. The cubic root of 6988879 is about 191.1917612125.

It can be divided in two parts, 698887 and 9, that added together give a palindrome (698896).

The spelling of 6988879 in words is "six million, nine hundred eighty-eight thousand, eight hundred seventy-nine".