6991410971 has 2 divisors, whose sum is σ = 6991410972. Its totient is φ = 6991410970.

The previous prime is 6991410953. The next prime is 6991410983. The reversal of 6991410971 is 1790141996.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6991410971 is a prime.

It is not a weakly prime, because it can be changed into another prime (6991413971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495705485 + 3495705486.

It is an arithmetic number, because the mean of its divisors is an integer number (3495705486).

Almost surely, 2^6991410971 is an apocalyptic number.

6991410971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6991410971 is an equidigital number, since it uses as much as digits as its factorization.

6991410971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 6991410971 is about 83614.6576324989. The cubic root of 6991410971 is about 1912.1484710595.

The spelling of 6991410971 in words is "six billion, nine hundred ninety-one million, four hundred ten thousand, nine hundred seventy-one".