201947911 has 12 divisors (see below), whose sum is σ = 222642000. Its totient is φ = 183038240.

The previous prime is 201947899. The next prime is 201947971. The reversal of 201947911 is 119749102.

It is not a de Polignac number, because 201947911 - 2²⁵ = 168393479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201947971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41115 + ... + 45763.

It is an arithmetic number, because the mean of its divisors is an integer number (18553500).

Almost surely, 2^201947911 is an apocalyptic number.

201947911 is a deficient number, since it is larger than the sum of its proper divisors (20694089).

201947911 is a wasteful number, since it uses less digits than its factorization.

201947911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 201947911 is about 14210.8378007773. The cubic root of 201947911 is about 586.6959924577.

The spelling of 201947911 in words is "two hundred one million, nine hundred forty-seven thousand, nine hundred eleven".