8171997 has 24 divisors (see below), whose sum is σ = 11706240. Its totient is φ = 5066880.

The previous prime is 8171993. The next prime is 8172013. The reversal of 8171997 is 7991718.

It is a happy number.

It is not a de Polignac number, because 8171997 - 2² = 8171993 is a prime.

8171997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8171993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103404 + ... + 103482.

It is an arithmetic number, because the mean of its divisors is an integer number (487760).

Almost surely, 2^8171997 is an apocalyptic number.

8171997 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

8171997 is a deficient number, since it is larger than the sum of its proper divisors (3534243).

8171997 is a wasteful number, since it uses less digits than its factorization.

8171997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 152 counting only the distinct ones).

The product of its digits is 31752, while the sum is 42.

The square root of 8171997 is about 2858.6704951778. The cubic root of 8171997 is about 201.4231574278.

The spelling of 8171997 in words is "eight million, one hundred seventy-one thousand, nine hundred ninety-seven".