6981906 has 8 divisors (see below), whose sum is σ = 13963824. Its totient is φ = 2327300.

The previous prime is 6981889. The next prime is 6981943. The reversal of 6981906 is 6091896.

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

6981906 is an admirable number.

It is a super-2 number, since 2×6981906² = 97494022785672, which contains 22 as substring.

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, 581820 + ... + 581831.

It is an arithmetic number, because the mean of its divisors is an integer number (1745478).

Almost surely, 2^6981906 is an apocalyptic number.

6981906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6981906 is a wasteful number, since it uses less digits than its factorization.

6981906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163656.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 6981906 is about 2642.3296539228. The cubic root of 6981906 is about 191.1281542650.

It can be divided in two parts, 6981 and 906, that added together give a palindrome (7887).

The spelling of 6981906 in words is "six million, nine hundred eighty-one thousand, nine hundred six".