6987998 has 16 divisors (see below), whose sum is σ = 11092896. Its totient is φ = 3294720.

The previous prime is 6987983. The next prime is 6988039. The reversal of 6987998 is 8997896.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318 + ... + 4398.

It is an arithmetic number, because the mean of its divisors is an integer number (693306).

Almost surely, 2^6987998 is an apocalyptic number.

6987998 is a deficient number, since it is larger than the sum of its proper divisors (4104898).

6987998 is a wasteful number, since it uses less digits than its factorization.

6987998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179.

The product of its digits is 1959552, while the sum is 56.

The square root of 6987998 is about 2643.4821731950. The cubic root of 6987998 is about 191.1837271621.

The spelling of 6987998 in words is "six million, nine hundred eighty-seven thousand, nine hundred ninety-eight".