971020189 has 2 divisors, whose sum is σ = 971020190. Its totient is φ = 971020188.

The previous prime is 971020153. The next prime is 971020199. The reversal of 971020189 is 981020179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560268900 + 410751289 = 23670^2 + 20267^2 .

It is a cyclic number.

It is not a de Polignac number, because 971020189 - 2¹³ = 971011997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971020129) 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, 485510094 + 485510095.

It is an arithmetic number, because the mean of its divisors is an integer number (485510095).

Almost surely, 2^971020189 is an apocalyptic number.

It is an amenable number.

971020189 is a deficient number, since it is larger than the sum of its proper divisors (1).

971020189 is an equidigital number, since it uses as much as digits as its factorization.

971020189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 971020189 is about 31161.1968480031. The cubic root of 971020189 is about 990.2452166091.

The spelling of 971020189 in words is "nine hundred seventy-one million, twenty thousand, one hundred eighty-nine".