171680427 has 6 divisors (see below), whose sum is σ = 247982852. Its totient is φ = 114453612.

The previous prime is 171680423. The next prime is 171680461. The reversal of 171680427 is 724086171.

171680427 is a `hidden beast` number, since 171 + 68 + 0 + 427 = 666.

It is not a de Polignac number, because 171680427 - 2² = 171680423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171680391 and 171680400.

It is not an unprimeable number, because it can be changed into a prime (171680423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9537793 + ... + 9537810.

Almost surely, 2^171680427 is an apocalyptic number.

171680427 is a deficient number, since it is larger than the sum of its proper divisors (76302425).

171680427 is a wasteful number, since it uses less digits than its factorization.

171680427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19075609 (or 19075606 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 171680427 is about 13102.6877777042. The cubic root of 171680427 is about 555.7851366438.

The spelling of 171680427 in words is "one hundred seventy-one million, six hundred eighty thousand, four hundred twenty-seven".