871997 has 8 divisors (see below), whose sum is σ = 1020096. Its totient is φ = 729792.

The previous prime is 871993. The next prime is 872017. The reversal of 871997 is 799178.

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

It is not a de Polignac number, because 871997 - 2² = 871993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1148 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (127512).

2⁸⁷¹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

871997 is a deficient number, since it is larger than the sum of its proper divisors (148099).

871997 is a wasteful number, since it uses less digits than its factorization.

871997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947.

The product of its digits is 31752, while the sum is 41.

The square root of 871997 is about 933.8077960694. The cubic root of 871997 is about 95.5370140597.

The spelling of 871997 in words is "eight hundred seventy-one thousand, nine hundred ninety-seven".