9945970171 has 2 divisors, whose sum is σ = 9945970172. Its totient is φ = 9945970170.

The previous prime is 9945970169. The next prime is 9945970211. The reversal of 9945970171 is 1710795499.

9945970171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9945970171 - 2¹ = 9945970169 is a prime.

Together with 9945970169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9945973171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972985085 + 4972985086.

It is an arithmetic number, because the mean of its divisors is an integer number (4972985086).

Almost surely, 2^9945970171 is an apocalyptic number.

9945970171 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945970171 is an equidigital number, since it uses as much as digits as its factorization.

9945970171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 52.

The square root of 9945970171 is about 99729.4849630740. The cubic root of 9945970171 is about 2150.5475563014.

The spelling of 9945970171 in words is "nine billion, nine hundred forty-five million, nine hundred seventy thousand, one hundred seventy-one".