201889 has 2 divisors, whose sum is σ = 201890. Its totient is φ = 201888.

The previous prime is 201881. The next prime is 201893. The reversal of 201889 is 988102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187489 + 14400 = 433^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 201889 - 2³ = 201881 is a prime.

201889 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (201881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100944 + 100945.

It is an arithmetic number, because the mean of its divisors is an integer number (100945).

2²⁰¹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

201889 is a deficient number, since it is larger than the sum of its proper divisors (1).

201889 is an equidigital number, since it uses as much as digits as its factorization.

201889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 201889 is about 449.3205982369. The cubic root of 201889 is about 58.6638937796.

The spelling of 201889 in words is "two hundred one thousand, eight hundred eighty-nine".