6998687 has 2 divisors, whose sum is σ = 6998688. Its totient is φ = 6998686.

The previous prime is 6998681. The next prime is 6998711. The reversal of 6998687 is 7868996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6998687 - 2⁶ = 6998623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6998681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499343 + 3499344.

It is an arithmetic number, because the mean of its divisors is an integer number (3499344).

Almost surely, 2^6998687 is an apocalyptic number.

6998687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998687 is an equidigital number, since it uses as much as digits as its factorization.

6998687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 6998687 is about 2645.5031657513. The cubic root of 6998687 is about 191.2811571549.

The spelling of 6998687 in words is "six million, nine hundred ninety-eight thousand, six hundred eighty-seven".