171685345 has 8 divisors (see below), whose sum is σ = 221870376. Its totient is φ = 126782976.

The previous prime is 171685337. The next prime is 171685379. The reversal of 171685345 is 543586171.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14107536 + 157577809 = 3756^2 + 12553^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 171685345 - 2³ = 171685337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 171685298 and 171685307.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320592 + ... + 1320721.

It is an arithmetic number, because the mean of its divisors is an integer number (27733797).

Almost surely, 2^171685345 is an apocalyptic number.

It is an amenable number.

171685345 is a deficient number, since it is larger than the sum of its proper divisors (50185031).

171685345 is a wasteful number, since it uses less digits than its factorization.

171685345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641331.

The product of its digits is 100800, while the sum is 40.

The square root of 171685345 is about 13102.8754477786. The cubic root of 171685345 is about 555.7904436460.

The spelling of 171685345 in words is "one hundred seventy-one million, six hundred eighty-five thousand, three hundred forty-five".