171680497 has 4 divisors (see below), whose sum is σ = 171775296. Its totient is φ = 171585700.

The previous prime is 171680479. The next prime is 171680513. The reversal of 171680497 is 794086171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171680497 - 2¹¹ = 171678449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171680417) 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, 44629 + ... + 48322.

It is an arithmetic number, because the mean of its divisors is an integer number (42943824).

Almost surely, 2^171680497 is an apocalyptic number.

It is an amenable number.

171680497 is a deficient number, since it is larger than the sum of its proper divisors (94799).

171680497 is an equidigital number, since it uses as much as digits as its factorization.

171680497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94798.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 171680497 is about 13102.6904489116. The cubic root of 171680497 is about 555.7852121814.

The spelling of 171680497 in words is "one hundred seventy-one million, six hundred eighty thousand, four hundred ninety-seven".