201288749 has 2 divisors, whose sum is σ = 201288750. Its totient is φ = 201288748.

The previous prime is 201288727. The next prime is 201288751. The reversal of 201288749 is 947882102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200788900 + 499849 = 14170^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 201288749 - 2¹⁶ = 201223213 is a prime.

Together with 201288751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201288779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100644374 + 100644375.

It is an arithmetic number, because the mean of its divisors is an integer number (100644375).

Almost surely, 2^201288749 is an apocalyptic number.

It is an amenable number.

201288749 is a deficient number, since it is larger than the sum of its proper divisors (1).

201288749 is an equidigital number, since it uses as much as digits as its factorization.

201288749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 201288749 is about 14187.6266161751. The cubic root of 201288749 is about 586.0569675579.

The spelling of 201288749 in words is "two hundred one million, two hundred eighty-eight thousand, seven hundred forty-nine".