6989918 has 8 divisors (see below), whose sum is σ = 11291448. Its totient is φ = 3226104.

The previous prime is 6989869. The next prime is 6989921. The reversal of 6989918 is 8199896.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134396 + ... + 134447.

It is an arithmetic number, because the mean of its divisors is an integer number (1411431).

Almost surely, 2^6989918 is an apocalyptic number.

6989918 is a deficient number, since it is larger than the sum of its proper divisors (4301530).

6989918 is a wasteful number, since it uses less digits than its factorization.

6989918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268858.

The product of its digits is 279936, while the sum is 50.

The square root of 6989918 is about 2643.8453056107. The cubic root of 6989918 is about 191.2012352353.

The spelling of 6989918 in words is "six million, nine hundred eighty-nine thousand, nine hundred eighteen".