201987163 has 6 divisors (see below), whose sum is σ = 234964716. Its totient is φ = 173131812.

The previous prime is 201987091. The next prime is 201987167. The reversal of 201987163 is 361789102.

It is not a de Polignac number, because 201987163 - 2¹⁷ = 201856091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201987167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2061045 + ... + 2061142.

It is an arithmetic number, because the mean of its divisors is an integer number (39160786).

Almost surely, 2^201987163 is an apocalyptic number.

201987163 is a deficient number, since it is larger than the sum of its proper divisors (32977553).

201987163 is an equidigital number, since it uses as much as digits as its factorization.

201987163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122201 (or 4122194 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 201987163 is about 14212.2187922928. The cubic root of 201987163 is about 586.7340014326.

The spelling of 201987163 in words is "two hundred one million, nine hundred eighty-seven thousand, one hundred sixty-three".