9969766871 has 2 divisors, whose sum is σ = 9969766872. Its totient is φ = 9969766870.

The previous prime is 9969766843. The next prime is 9969766879. The reversal of 9969766871 is 1786679699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9969766871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9969766879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984883435 + 4984883436.

It is an arithmetic number, because the mean of its divisors is an integer number (4984883436).

Almost surely, 2^9969766871 is an apocalyptic number.

9969766871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969766871 is an equidigital number, since it uses as much as digits as its factorization.

9969766871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 68.

The square root of 9969766871 is about 99848.7199266971. The cubic root of 9969766871 is about 2152.2613215703.

The spelling of 9969766871 in words is "nine billion, nine hundred sixty-nine million, seven hundred sixty-six thousand, eight hundred seventy-one".