6787489 has 2 divisors, whose sum is σ = 6787490. Its totient is φ = 6787488.

The previous prime is 6787457. The next prime is 6787493. The reversal of 6787489 is 9847876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6671889 + 115600 = 2583^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 6787489 - 2⁵ = 6787457 is a prime.

It is not a weakly prime, because it can be changed into another prime (6787439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3393744 + 3393745.

It is an arithmetic number, because the mean of its divisors is an integer number (3393745).

Almost surely, 2^6787489 is an apocalyptic number.

It is an amenable number.

6787489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6787489 is an equidigital number, since it uses as much as digits as its factorization.

6787489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 6787489 is about 2605.2809829268. The cubic root of 6787489 is about 189.3373871572.

The spelling of 6787489 in words is "six million, seven hundred eighty-seven thousand, four hundred eighty-nine".