171197397 has 24 divisors (see below), whose sum is σ = 284850176. Its totient is φ = 97052256.

The previous prime is 171197387. The next prime is 171197399. The reversal of 171197397 is 793791171.

171197397 is a `hidden beast` number, since 1 + 71 + 197 + 397 = 666.

It is not a de Polignac number, because 171197397 - 2⁴ = 171197381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171197399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2698 + ... + 18699.

Almost surely, 2^171197397 is an apocalyptic number.

It is an amenable number.

171197397 is a deficient number, since it is larger than the sum of its proper divisors (113652779).

171197397 is a wasteful number, since it uses less digits than its factorization.

171197397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21537 (or 21534 counting only the distinct ones).

The product of its digits is 83349, while the sum is 45.

The square root of 171197397 is about 13084.2423166189. The cubic root of 171197397 is about 555.2634055243.

The spelling of 171197397 in words is "one hundred seventy-one million, one hundred ninety-seven thousand, three hundred ninety-seven".