6969681 has 12 divisors (see below), whose sum is σ = 10092420. Its totient is φ = 4634880.

The previous prime is 6969673. The next prime is 6969689. The reversal of 6969681 is 1869696.

It is an interprime number because it is at equal distance from previous prime (6969673) and next prime (6969689).

It can be written as a sum of positive squares in 2 ways, for example, as 1166400 + 5803281 = 1080^2 + 2409^2 .

It is not a de Polignac number, because 6969681 - 2³ = 6969673 is a prime.

It is a super-2 number, since 2×6969681² = 97152906483522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6969689) 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 11 ways as a sum of consecutive naturals, for example, 4441 + ... + 5801.

It is an arithmetic number, because the mean of its divisors is an integer number (841035).

Almost surely, 2^6969681 is an apocalyptic number.

It is an amenable number.

6969681 is a deficient number, since it is larger than the sum of its proper divisors (3122739).

6969681 is a wasteful number, since it uses less digits than its factorization.

6969681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936 (or 1933 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 6969681 is about 2640.0153408645. The cubic root of 6969681 is about 191.0165368575.

It can be divided in two parts, 69696 and 81, that multiplied together give a square (5645376 = 2376²).

The spelling of 6969681 in words is "six million, nine hundred sixty-nine thousand, six hundred eighty-one".