6890687 has 2 divisors, whose sum is σ = 6890688. Its totient is φ = 6890686.

The previous prime is 6890683. The next prime is 6890699. The reversal of 6890687 is 7860986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6890687 - 2² = 6890683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6890683) 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 as a sum of consecutive naturals, namely, 3445343 + 3445344.

It is an arithmetic number, because the mean of its divisors is an integer number (3445344).

Almost surely, 2^6890687 is an apocalyptic number.

6890687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6890687 is an equidigital number, since it uses as much as digits as its factorization.

6890687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6890687 is about 2625.0118094972. The cubic root of 6890687 is about 190.2921360047.

Subtracting 6890687 from its reverse (7860986), we obtain a cube (970299 = 99³).

The spelling of 6890687 in words is "six million, eight hundred ninety thousand, six hundred eighty-seven".