171891013 has 8 divisors (see below), whose sum is σ = 199776960. Its totient is φ = 144837600.

The previous prime is 171890969. The next prime is 171891017. The reversal of 171891013 is 310198171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171891013 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 (171891017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207688 + ... + 208513.

It is an arithmetic number, because the mean of its divisors is an integer number (24972120).

Almost surely, 2^171891013 is an apocalyptic number.

It is an amenable number.

171891013 is a deficient number, since it is larger than the sum of its proper divisors (27885947).

171891013 is an equidigital number, since it uses as much as digits as its factorization.

171891013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416267.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 171891013 is about 13110.7212997607. The cubic root of 171891013 is about 556.0122888180.

The spelling of 171891013 in words is "one hundred seventy-one million, eight hundred ninety-one thousand, thirteen".