171027091 has 2 divisors, whose sum is σ = 171027092. Its totient is φ = 171027090.

The previous prime is 171027083. The next prime is 171027137. The reversal of 171027091 is 190720171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171027091 - 2³ = 171027083 is a prime.

It is not a weakly prime, because it can be changed into another prime (171027041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85513545 + 85513546.

It is an arithmetic number, because the mean of its divisors is an integer number (85513546).

Almost surely, 2^171027091 is an apocalyptic number.

171027091 is a deficient number, since it is larger than the sum of its proper divisors (1).

171027091 is an equidigital number, since it uses as much as digits as its factorization.

171027091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 171027091 is about 13077.7326398730. The cubic root of 171027091 is about 555.0792203557.

The spelling of 171027091 in words is "one hundred seventy-one million, twenty-seven thousand, ninety-one".