171280091 has 2 divisors, whose sum is σ = 171280092. Its totient is φ = 171280090.

The previous prime is 171280063. The next prime is 171280121. The reversal of 171280091 is 190082171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171280091 - 2¹⁰ = 171279067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171280891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85640045 + 85640046.

It is an arithmetic number, because the mean of its divisors is an integer number (85640046).

Almost surely, 2^171280091 is an apocalyptic number.

171280091 is a deficient number, since it is larger than the sum of its proper divisors (1).

171280091 is an equidigital number, since it uses as much as digits as its factorization.

171280091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 171280091 is about 13087.4019958126. The cubic root of 171280091 is about 555.3527946578.

The spelling of 171280091 in words is "one hundred seventy-one million, two hundred eighty thousand, ninety-one".