6939887 has 2 divisors, whose sum is σ = 6939888. Its totient is φ = 6939886.

The previous prime is 6939827. The next prime is 6939901. The reversal of 6939887 is 7889396.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6939887 - 2¹⁴ = 6923503 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 (6939817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469943 + 3469944.

It is an arithmetic number, because the mean of its divisors is an integer number (3469944).

Almost surely, 2^6939887 is an apocalyptic number.

6939887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6939887 is an equidigital number, since it uses as much as digits as its factorization.

6939887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 6939887 is about 2634.3665272699. The cubic root of 6939887 is about 190.7439621864.

The spelling of 6939887 in words is "six million, nine hundred thirty-nine thousand, eight hundred eighty-seven".