6847978469 has 2 divisors, whose sum is σ = 6847978470. Its totient is φ = 6847978468.

The previous prime is 6847978457. The next prime is 6847978513. The reversal of 6847978469 is 9648797486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4647148900 + 2200829569 = 68170^2 + 46913^2 .

It is a cyclic number.

It is not a de Polignac number, because 6847978469 - 2³² = 2553011173 is a prime.

It is a super-2 number, since 2×6847978469² = 93789618223775167922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6847978399 and 6847978408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6847978069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3423989234 + 3423989235.

It is an arithmetic number, because the mean of its divisors is an integer number (3423989235).

Almost surely, 2^6847978469 is an apocalyptic number.

It is an amenable number.

6847978469 is a deficient number, since it is larger than the sum of its proper divisors (1).

6847978469 is an equidigital number, since it uses as much as digits as its factorization.

6847978469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146313216, while the sum is 68.

The square root of 6847978469 is about 82752.5133696856. The cubic root of 6847978469 is about 1898.9817691902.

The spelling of 6847978469 in words is "six billion, eight hundred forty-seven million, nine hundred seventy-eight thousand, four hundred sixty-nine".