171009643 has 8 divisors (see below), whose sum is σ = 196294880. Its totient is φ = 145938240.

The previous prime is 171009617. The next prime is 171009649. The reversal of 171009643 is 346900171.

It is a happy number.

171009643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 171009643 - 2⁵ = 171009611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171009649) 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, 51738 + ... + 54943.

It is an arithmetic number, because the mean of its divisors is an integer number (24536860).

Almost surely, 2^171009643 is an apocalyptic number.

171009643 is a deficient number, since it is larger than the sum of its proper divisors (25285237).

171009643 is a wasteful number, since it uses less digits than its factorization.

171009643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106917.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 171009643 is about 13077.0655347444. The cubic root of 171009643 is about 555.0603435186.

The spelling of 171009643 in words is "one hundred seventy-one million, nine thousand, six hundred forty-three".