6900781841 has 2 divisors, whose sum is σ = 6900781842. Its totient is φ = 6900781840.

The previous prime is 6900781819. The next prime is 6900781847. The reversal of 6900781841 is 1481870096.

6900781841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6826890625 + 73891216 = 82625^2 + 8596^2 .

It is a cyclic number.

It is not a de Polignac number, because 6900781841 - 2¹⁴ = 6900765457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6900781792 and 6900781801.

It is not a weakly prime, because it can be changed into another prime (6900781847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3450390920 + 3450390921.

It is an arithmetic number, because the mean of its divisors is an integer number (3450390921).

Almost surely, 2^6900781841 is an apocalyptic number.

It is an amenable number.

6900781841 is a deficient number, since it is larger than the sum of its proper divisors (1).

6900781841 is an equidigital number, since it uses as much as digits as its factorization.

6900781841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 6900781841 is about 83070.9446256632. The cubic root of 6900781841 is about 1903.8501651365.

The spelling of 6900781841 in words is "six billion, nine hundred million, seven hundred eighty-one thousand, eight hundred forty-one".