1091050171 has 2 divisors, whose sum is σ = 1091050172. Its totient is φ = 1091050170.

The previous prime is 1091050159. The next prime is 1091050187. The reversal of 1091050171 is 1710501901.

It is a weak prime.

It is an emirp because it is prime and its reverse (1710501901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1091050171 - 2¹⁷ = 1090919099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1091050141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545525085 + 545525086.

It is an arithmetic number, because the mean of its divisors is an integer number (545525086).

Almost surely, 2^1091050171 is an apocalyptic number.

1091050171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091050171 is an equidigital number, since it uses as much as digits as its factorization.

1091050171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 25.

The square root of 1091050171 is about 33031.0485906821. The cubic root of 1091050171 is about 1029.4728728909.

The spelling of 1091050171 in words is "one billion, ninety-one million, fifty thousand, one hundred seventy-one".