39897 has 24 divisors (see below), whose sum is σ = 69888. Its totient is φ = 21600.

The previous prime is 39887. The next prime is 39901. The reversal of 39897 is 79893.

39897 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 39897 - 2⁷ = 39769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39827) 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, 1272 + ... + 1302.

It is an arithmetic number, because the mean of its divisors is an integer number (2912).

2³⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

39897 is a deficient number, since it is larger than the sum of its proper divisors (29991).

39897 is a wasteful number, since it uses less digits than its factorization.

39897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61 (or 58 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 39897 is about 199.7423340206. The cubic root of 39897 is about 34.1701391143.

The spelling of 39897 in words is "thirty-nine thousand, eight hundred ninety-seven".