9945970211 has 2 divisors, whose sum is σ = 9945970212. Its totient is φ = 9945970210.

The previous prime is 9945970171. The next prime is 9945970217. The reversal of 9945970211 is 1120795499.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9945970211 is a prime.

It is not a weakly prime, because it can be changed into another prime (9945970217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972985105 + 4972985106.

It is an arithmetic number, because the mean of its divisors is an integer number (4972985106).

Almost surely, 2^9945970211 is an apocalyptic number.

9945970211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945970211 is an equidigital number, since it uses as much as digits as its factorization.

9945970211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 9945970211 is about 99729.4851636165. The cubic root of 9945970211 is about 2150.5475591844.

The spelling of 9945970211 in words is "nine billion, nine hundred forty-five million, nine hundred seventy thousand, two hundred eleven".