6780427 has 2 divisors, whose sum is σ = 6780428. Its totient is φ = 6780426.

The previous prime is 6780421. The next prime is 6780439. The reversal of 6780427 is 7240876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6780427 - 2³ = 6780419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6780392 and 6780401.

It is not a weakly prime, because it can be changed into another prime (6780421) 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, 3390213 + 3390214.

It is an arithmetic number, because the mean of its divisors is an integer number (3390214).

Almost surely, 2^6780427 is an apocalyptic number.

6780427 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780427 is an equidigital number, since it uses as much as digits as its factorization.

6780427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 6780427 is about 2603.9253061484. The cubic root of 6780427 is about 189.2716994082.

The spelling of 6780427 in words is "six million, seven hundred eighty thousand, four hundred twenty-seven".