171685113 has 4 divisors (see below), whose sum is σ = 228913488. Its totient is φ = 114456740.

The previous prime is 171685097. The next prime is 171685117. The reversal of 171685113 is 311586171.

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.

It is a cyclic number.

It is not a de Polignac number, because 171685113 - 2⁴ = 171685097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171685117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28614183 + ... + 28614188.

It is an arithmetic number, because the mean of its divisors is an integer number (57228372).

Almost surely, 2^171685113 is an apocalyptic number.

It is an amenable number.

171685113 is a deficient number, since it is larger than the sum of its proper divisors (57228375).

171685113 is an equidigital number, since it uses as much as digits as its factorization.

171685113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57228374.

The product of its digits is 5040, while the sum is 33.

The square root of 171685113 is about 13102.8665947570. The cubic root of 171685113 is about 555.7901932977.

The spelling of 171685113 in words is "one hundred seventy-one million, six hundred eighty-five thousand, one hundred thirteen".