171612071 has 4 divisors (see below), whose sum is σ = 172153752. Its totient is φ = 171070392.

The previous prime is 171612043. The next prime is 171612137. The reversal of 171612071 is 170216171.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171612071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171612071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171614071) 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, 270365 + ... + 270998.

It is an arithmetic number, because the mean of its divisors is an integer number (43038438).

Almost surely, 2^171612071 is an apocalyptic number.

171612071 is a deficient number, since it is larger than the sum of its proper divisors (541681).

171612071 is an equidigital number, since it uses as much as digits as its factorization.

171612071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541680.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 171612071 is about 13100.0790455630. The cubic root of 171612071 is about 555.7113633494.

The spelling of 171612071 in words is "one hundred seventy-one million, six hundred twelve thousand, seventy-one".