171242913 has 4 divisors (see below), whose sum is σ = 228323888. Its totient is φ = 114161940.

The previous prime is 171242893. The next prime is 171242923. The reversal of 171242913 is 319242171.

171242913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 319242171 = 3 ⋅106414057.

It is not a de Polignac number, because 171242913 - 2⁸ = 171242657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (171242923) 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, 28540483 + ... + 28540488.

It is an arithmetic number, because the mean of its divisors is an integer number (57080972).

Almost surely, 2^171242913 is an apocalyptic number.

It is an amenable number.

171242913 is a deficient number, since it is larger than the sum of its proper divisors (57080975).

171242913 is an equidigital number, since it uses as much as digits as its factorization.

171242913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57080974.

The product of its digits is 3024, while the sum is 30.

The square root of 171242913 is about 13085.9815451498. The cubic root of 171242913 is about 555.3126101854.

The spelling of 171242913 in words is "one hundred seventy-one million, two hundred forty-two thousand, nine hundred thirteen".