6978934447 has 2 divisors, whose sum is σ = 6978934448. Its totient is φ = 6978934446.

The previous prime is 6978934409. The next prime is 6978934531. The reversal of 6978934447 is 7444398796.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6978934447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6978934147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489467223 + 3489467224.

It is an arithmetic number, because the mean of its divisors is an integer number (3489467224).

Almost surely, 2^6978934447 is an apocalyptic number.

6978934447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978934447 is an equidigital number, since it uses as much as digits as its factorization.

6978934447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 61.

The square root of 6978934447 is about 83540.0170397397. The cubic root of 6978934447 is about 1911.0103521211.

The spelling of 6978934447 in words is "six billion, nine hundred seventy-eight million, nine hundred thirty-four thousand, four hundred forty-seven".