71897 has 4 divisors (see below), whose sum is σ = 82176. Its totient is φ = 61620.

The previous prime is 71887. The next prime is 71899. The reversal of 71897 is 79817.

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 71897 - 2⁴ = 71881 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71899) 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, 5129 + ... + 5142.

It is an arithmetic number, because the mean of its divisors is an integer number (20544).

2⁷¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

71897 is a deficient number, since it is larger than the sum of its proper divisors (10279).

71897 is a wasteful number, since it uses less digits than its factorization.

71897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10278.

The product of its digits is 3528, while the sum is 32.

The square root of 71897 is about 268.1361594414. The cubic root of 71897 is about 41.5818291573.

The spelling of 71897 in words is "seventy-one thousand, eight hundred ninety-seven".