6987427 has 2 divisors, whose sum is σ = 6987428. Its totient is φ = 6987426.

The previous prime is 6987419. The next prime is 6987433. The reversal of 6987427 is 7247896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6987427 - 2³ = 6987419 is a prime.

It is an Ulam number.

6987427 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6987727) 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, 3493713 + 3493714.

It is an arithmetic number, because the mean of its divisors is an integer number (3493714).

Almost surely, 2^6987427 is an apocalyptic number.

6987427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6987427 is an equidigital number, since it uses as much as digits as its factorization.

6987427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 6987427 is about 2643.3741695038. The cubic root of 6987427 is about 191.1785197154.

The spelling of 6987427 in words is "six million, nine hundred eighty-seven thousand, four hundred twenty-seven".