6981986 has 8 divisors (see below), whose sum is σ = 11425104. Its totient is φ = 3173620.

The previous prime is 6981983. The next prime is 6982009. The reversal of 6981986 is 6891896.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6981986.

It is not an unprimeable number, because it can be changed into a prime (6981983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158660 + ... + 158703.

It is an arithmetic number, because the mean of its divisors is an integer number (1428138).

Almost surely, 2^6981986 is an apocalyptic number.

6981986 is a deficient number, since it is larger than the sum of its proper divisors (4443118).

6981986 is a wasteful number, since it uses less digits than its factorization.

6981986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317376.

The product of its digits is 186624, while the sum is 47.

The square root of 6981986 is about 2642.3447920360. The cubic root of 6981986 is about 191.1288842564.

The spelling of 6981986 in words is "six million, nine hundred eighty-one thousand, nine hundred eighty-six".