171916539 has 4 divisors (see below), whose sum is σ = 229222056. Its totient is φ = 114611024.

The previous prime is 171916523. The next prime is 171916543. The reversal of 171916539 is 935619171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935619171 = 3 ⋅311873057.

It is a cyclic number.

It is not a de Polignac number, because 171916539 - 2⁴ = 171916523 is a prime.

It is a super-4 number, since 4×171916539⁴ (a number of 34 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171916539.

It is not an unprimeable number, because it can be changed into a prime (171916519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28652754 + ... + 28652759.

It is an arithmetic number, because the mean of its divisors is an integer number (57305514).

Almost surely, 2^171916539 is an apocalyptic number.

171916539 is a deficient number, since it is larger than the sum of its proper divisors (57305517).

171916539 is an equidigital number, since it uses as much as digits as its factorization.

171916539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57305516.

The product of its digits is 51030, while the sum is 42.

The square root of 171916539 is about 13111.6947417182. The cubic root of 171916539 is about 556.0398102630.

The spelling of 171916539 in words is "one hundred seventy-one million, nine hundred sixteen thousand, five hundred thirty-nine".