200891189 has 2 divisors, whose sum is σ = 200891190. Its totient is φ = 200891188.

The previous prime is 200891137. The next prime is 200891209. The reversal of 200891189 is 981198002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200448964 + 442225 = 14158^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 200891189 - 2²⁰ = 199842613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200891989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100445594 + 100445595.

It is an arithmetic number, because the mean of its divisors is an integer number (100445595).

Almost surely, 2^200891189 is an apocalyptic number.

It is an amenable number.

200891189 is a deficient number, since it is larger than the sum of its proper divisors (1).

200891189 is an equidigital number, since it uses as much as digits as its factorization.

200891189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 200891189 is about 14173.6088911752. The cubic root of 200891189 is about 585.6708781378.

The spelling of 200891189 in words is "two hundred million, eight hundred ninety-one thousand, one hundred eighty-nine".