171157423 has 4 divisors (see below), whose sum is σ = 171624160. Its totient is φ = 170690688.

The previous prime is 171157379. The next prime is 171157429. The reversal of 171157423 is 324751171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171157423 - 2²⁵ = 137602991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171157429) 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, 232818 + ... + 233551.

It is an arithmetic number, because the mean of its divisors is an integer number (42906040).

Almost surely, 2^171157423 is an apocalyptic number.

171157423 is a deficient number, since it is larger than the sum of its proper divisors (466737).

171157423 is an equidigital number, since it uses as much as digits as its factorization.

171157423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466736.

The product of its digits is 5880, while the sum is 31.

The square root of 171157423 is about 13082.7146647781. The cubic root of 171157423 is about 555.2201847987.

The spelling of 171157423 in words is "one hundred seventy-one million, one hundred fifty-seven thousand, four hundred twenty-three".