191082289 has 2 divisors, whose sum is σ = 191082290. Its totient is φ = 191082288.

The previous prime is 191082271. The next prime is 191082293. The reversal of 191082289 is 982280191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184280625 + 6801664 = 13575^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 191082289 - 2⁷ = 191082161 is a prime.

It is not a weakly prime, because it can be changed into another prime (191082299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95541144 + 95541145.

It is an arithmetic number, because the mean of its divisors is an integer number (95541145).

Almost surely, 2^191082289 is an apocalyptic number.

It is an amenable number.

191082289 is a deficient number, since it is larger than the sum of its proper divisors (1).

191082289 is an equidigital number, since it uses as much as digits as its factorization.

191082289 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 40.

The square root of 191082289 is about 13823.2517520300. The cubic root of 191082289 is about 575.9792151467.

The spelling of 191082289 in words is "one hundred ninety-one million, eighty-two thousand, two hundred eighty-nine".