9947830211 has 32 divisors (see below), whose sum is σ = 12034262016. Its totient is φ = 8111488000.

The previous prime is 9947830121. The next prime is 9947830229. The reversal of 9947830211 is 1120387499.

It is not a de Polignac number, because 9947830211 - 2²² = 9943635907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947830511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1204466 + ... + 1212696.

It is an arithmetic number, because the mean of its divisors is an integer number (376070688).

Almost surely, 2^9947830211 is an apocalyptic number.

9947830211 is a deficient number, since it is larger than the sum of its proper divisors (2086431805).

9947830211 is a wasteful number, since it uses less digits than its factorization.

9947830211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 9947830211 is about 99738.8099537988. The cubic root of 9947830211 is about 2150.6816090912.

The spelling of 9947830211 in words is "nine billion, nine hundred forty-seven million, eight hundred thirty thousand, two hundred eleven".