6971395643 has 2 divisors, whose sum is σ = 6971395644. Its totient is φ = 6971395642.

The previous prime is 6971395609. The next prime is 6971395679. The reversal of 6971395643 is 3465931796.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6971395643 - 2²⁴ = 6954618427 is a prime.

It is a super-2 number, since 2×6971395643² = 97200714422478766898, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6971395943) 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, 3485697821 + 3485697822.

It is an arithmetic number, because the mean of its divisors is an integer number (3485697822).

Almost surely, 2^6971395643 is an apocalyptic number.

6971395643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6971395643 is an equidigital number, since it uses as much as digits as its factorization.

6971395643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 53.

The square root of 6971395643 is about 83494.8839330890. The cubic root of 6971395643 is about 1910.3219985620.

The spelling of 6971395643 in words is "six billion, nine hundred seventy-one million, three hundred ninety-five thousand, six hundred forty-three".