201118997 has 2 divisors, whose sum is σ = 201118998. Its totient is φ = 201118996.

The previous prime is 201118991. The next prime is 201119029. The reversal of 201118997 is 799811102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102434641 + 98684356 = 10121^2 + 9934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201118997 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201118997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201118991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100559498 + 100559499.

It is an arithmetic number, because the mean of its divisors is an integer number (100559499).

Almost surely, 2^201118997 is an apocalyptic number.

It is an amenable number.

201118997 is a deficient number, since it is larger than the sum of its proper divisors (1).

201118997 is an equidigital number, since it uses as much as digits as its factorization.

201118997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 201118997 is about 14181.6429584163. The cubic root of 201118997 is about 585.8921755666.

The spelling of 201118997 in words is "two hundred one million, one hundred eighteen thousand, nine hundred ninety-seven".