6978573947 has 2 divisors, whose sum is σ = 6978573948. Its totient is φ = 6978573946.

The previous prime is 6978573923. The next prime is 6978573977. The reversal of 6978573947 is 7493758796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6978573947 - 2⁸ = 6978573691 is a prime.

It is not a weakly prime, because it can be changed into another prime (6978573907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489286973 + 3489286974.

It is an arithmetic number, because the mean of its divisors is an integer number (3489286974).

Almost surely, 2^6978573947 is an apocalyptic number.

6978573947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978573947 is an equidigital number, since it uses as much as digits as its factorization.

6978573947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80015040, while the sum is 65.

The square root of 6978573947 is about 83537.8593632851. The cubic root of 6978573947 is about 1910.9774468546.

The spelling of 6978573947 in words is "six billion, nine hundred seventy-eight million, five hundred seventy-three thousand, nine hundred forty-seven".