201166489 has 2 divisors, whose sum is σ = 201166490. Its totient is φ = 201166488.

The previous prime is 201166481. The next prime is 201166517. The reversal of 201166489 is 984661102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102819600 + 98346889 = 10140^2 + 9917^2 .

It is a cyclic number.

It is not a de Polignac number, because 201166489 - 2³ = 201166481 is a prime.

It is not a weakly prime, because it can be changed into another prime (201166481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100583244 + 100583245.

It is an arithmetic number, because the mean of its divisors is an integer number (100583245).

Almost surely, 2^201166489 is an apocalyptic number.

It is an amenable number.

201166489 is a deficient number, since it is larger than the sum of its proper divisors (1).

201166489 is an equidigital number, since it uses as much as digits as its factorization.

201166489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 201166489 is about 14183.3172777034. The cubic root of 201166489 is about 585.9382892301.

The spelling of 201166489 in words is "two hundred one million, one hundred sixty-six thousand, four hundred eighty-nine".