171145473 has 4 divisors (see below), whose sum is σ = 228193968. Its totient is φ = 114096980.

The previous prime is 171145463. The next prime is 171145517. The reversal of 171145473 is 374541171.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374541171 = 3 ⋅124847057.

It is a cyclic number.

It is not a de Polignac number, because 171145473 - 2¹⁸ = 170883329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171145433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524243 + ... + 28524248.

It is an arithmetic number, because the mean of its divisors is an integer number (57048492).

Almost surely, 2^171145473 is an apocalyptic number.

It is an amenable number.

171145473 is a deficient number, since it is larger than the sum of its proper divisors (57048495).

171145473 is an equidigital number, since it uses as much as digits as its factorization.

171145473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57048494.

The product of its digits is 11760, while the sum is 33.

The square root of 171145473 is about 13082.2579473117. The cubic root of 171145473 is about 555.2072629020.

The spelling of 171145473 in words is "one hundred seventy-one million, one hundred forty-five thousand, four hundred seventy-three".