6990705 has 40 divisors (see below), whose sum is σ = 12867624. Its totient is φ = 3628800.

The previous prime is 6990703. The next prime is 6990721. The reversal of 6990705 is 5070996.

It can be written as a sum of positive squares in 4 ways, for example, as 685584 + 6305121 = 828^2 + 2511^2 .

It is not a de Polignac number, because 6990705 - 2¹ = 6990703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6990705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16395 + ... + 16815.

Almost surely, 2^6990705 is an apocalyptic number.

It is an amenable number.

6990705 is a deficient number, since it is larger than the sum of its proper divisors (5876919).

6990705 is a wasteful number, since it uses less digits than its factorization.

6990705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 6990705 is about 2643.9941376637. The cubic root of 6990705 is about 191.2084107952.

The spelling of 6990705 in words is "six million, nine hundred ninety thousand, seven hundred five".