6985881 has 48 divisors (see below), whose sum is σ = 12313600. Its totient is φ = 3810240.

The previous prime is 6985871. The next prime is 6985883. The reversal of 6985881 is 1885896.

6985881 is a `hidden beast` number, since 69 + 8 + 588 + 1 = 666.

It is not a de Polignac number, because 6985881 - 2⁷ = 6985753 is a prime.

It is a super-2 number, since 2×6985881² = 97605066692322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6985883) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 95661 + ... + 95733.

Almost surely, 2^6985881 is an apocalyptic number.

It is an amenable number.

6985881 is a deficient number, since it is larger than the sum of its proper divisors (5327719).

6985881 is a wasteful number, since it uses less digits than its factorization.

6985881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 114 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 6985881 is about 2643.0817240487. The cubic root of 6985881 is about 191.1644189697.

The spelling of 6985881 in words is "six million, nine hundred eighty-five thousand, eight hundred eighty-one".