71397 has 6 divisors (see below), whose sum is σ = 103142. Its totient is φ = 47592.

The previous prime is 71389. The next prime is 71399. The reversal of 71397 is 79317.

It can be written as a sum of positive squares in only one way, i.e., 54756 + 16641 = 234^2 + 129^2 .

It is not a de Polignac number, because 71397 - 2³ = 71389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71397.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 71397.

It is not an unprimeable number, because it can be changed into a prime (71399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3958 + ... + 3975.

2⁷¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

71397 is a deficient number, since it is larger than the sum of its proper divisors (31745).

71397 is a wasteful number, since it uses less digits than its factorization.

71397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939 (or 7936 counting only the distinct ones).

The product of its digits is 1323, while the sum is 27.

The square root of 71397 is about 267.2021706499. The cubic root of 71397 is about 41.4852127120.

It can be divided in two parts, 7 and 1397, that multiplied together give a palindrome (9779).

The spelling of 71397 in words is "seventy-one thousand, three hundred ninety-seven".