201887489 has 2 divisors, whose sum is σ = 201887490. Its totient is φ = 201887488.

The previous prime is 201887467. The next prime is 201887501. The reversal of 201887489 is 984788102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137358400 + 64529089 = 11720^2 + 8033^2 .

It is a cyclic number.

It is not a de Polignac number, because 201887489 - 2⁸ = 201887233 is a prime.

It is not a weakly prime, because it can be changed into another prime (201887449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100943744 + 100943745.

It is an arithmetic number, because the mean of its divisors is an integer number (100943745).

Almost surely, 2^201887489 is an apocalyptic number.

It is an amenable number.

201887489 is a deficient number, since it is larger than the sum of its proper divisors (1).

201887489 is an equidigital number, since it uses as much as digits as its factorization.

201887489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 201887489 is about 14208.7117290766. The cubic root of 201887489 is about 586.6374742634.

The spelling of 201887489 in words is "two hundred one million, eight hundred eighty-seven thousand, four hundred eighty-nine".