6989878 has 8 divisors (see below), whose sum is σ = 11982672. Its totient is φ = 2995656.

The previous prime is 6989869. The next prime is 6989921. The reversal of 6989878 is 8789896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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, 249625 + ... + 249652.

It is an arithmetic number, because the mean of its divisors is an integer number (1497834).

Almost surely, 2^6989878 is an apocalyptic number.

6989878 is a deficient number, since it is larger than the sum of its proper divisors (4992794).

6989878 is a wasteful number, since it uses less digits than its factorization.

6989878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499286.

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

The square root of 6989878 is about 2643.8377408608. The cubic root of 6989878 is about 191.2008705165.

The spelling of 6989878 in words is "six million, nine hundred eighty-nine thousand, eight hundred seventy-eight".