6978761 has 2 divisors, whose sum is σ = 6978762.
Its totient is φ = 6978760.
The previous prime is 6978749. The next prime is 6978779. The reversal of 6978761 is 1678796.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 5550736 + 1428025 = 2356^2 + 1195^2
It is a cyclic number.
It is not a de Polignac number, because 6978761 - 214 = 6962377 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is not a weakly prime, because it can be changed into another prime (6978061) 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, 3489380 + 3489381.
It is an arithmetic number, because the mean of its divisors is an integer number (3489381).
Almost surely, 26978761 is an apocalyptic number.
It is an amenable number.
6978761 is a deficient number, since it is larger than the sum of its proper divisors (1).
6978761 is an equidigital number, since it uses as much as digits as its factorization.
6978761 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 127008, while the sum is 44.
The square root of 6978761 is about 2641.7344681099.
The cubic root of 6978761 is about 191.0994520585.
The spelling of 6978761 in words is "six million, nine hundred seventy-eight thousand, seven hundred sixty-one".