1201082189 has 2 divisors, whose sum is σ = 1201082190. Its totient is φ = 1201082188.

The previous prime is 1201082177. The next prime is 1201082191. The reversal of 1201082189 is 9812801021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864066025 + 337016164 = 29395^2 + 18358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201082189 - 2⁴ = 1201082173 is a prime.

Together with 1201082191, 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 (1201082119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600541094 + 600541095.

It is an arithmetic number, because the mean of its divisors is an integer number (600541095).

Almost surely, 2^1201082189 is an apocalyptic number.

It is an amenable number.

1201082189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201082189 is an equidigital number, since it uses as much as digits as its factorization.

1201082189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 1201082189 is about 34656.6326840909. The cubic root of 1201082189 is about 1062.9779169295.

The spelling of 1201082189 in words is "one billion, two hundred one million, eighty-two thousand, one hundred eighty-nine".