39797 has 4 divisors (see below), whose sum is σ = 42156. Its totient is φ = 37440.

The previous prime is 39791. The next prime is 39799. The reversal of 39797 is 79793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79793 = 7 ⋅11399.

It can be written as a sum of positive squares in 2 ways, for example, as 28561 + 11236 = 169^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 39797 - 2⁶ = 39733 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39791) 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, 1154 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (10539).

2³⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

39797 is a deficient number, since it is larger than the sum of its proper divisors (2359).

39797 is a wasteful number, since it uses less digits than its factorization.

39797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358.

The product of its digits is 11907, while the sum is 35.

The square root of 39797 is about 199.4918544703. The cubic root of 39797 is about 34.1415666005.

It can be divided in two parts, 397 and 97, that added together give a palindrome (494).

The spelling of 39797 in words is "thirty-nine thousand, seven hundred ninety-seven".