7969931647 has 2 divisors, whose sum is σ = 7969931648. Its totient is φ = 7969931646.

The previous prime is 7969931623. The next prime is 7969931747. The reversal of 7969931647 is 7461399697.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7969931647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7969931447) 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, 3984965823 + 3984965824.

It is an arithmetic number, because the mean of its divisors is an integer number (3984965824).

Almost surely, 2^7969931647 is an apocalyptic number.

7969931647 is a deficient number, since it is larger than the sum of its proper divisors (1).

7969931647 is an equidigital number, since it uses as much as digits as its factorization.

7969931647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15431472, while the sum is 61.

The square root of 7969931647 is about 89274.4736584876. The cubic root of 7969931647 is about 1997.4911580887.

The spelling of 7969931647 in words is "seven billion, nine hundred sixty-nine million, nine hundred thirty-one thousand, six hundred forty-seven".