24397 has 4 divisors (see below), whose sum is σ = 25216. Its totient is φ = 23580.

The previous prime is 24391. The next prime is 24407. The reversal of 24397 is 79342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79342 = 2 ⋅39671.

It is a cyclic number.

It is not a de Polignac number, because 24397 - 2¹¹ = 22349 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 4⁴ + 3⁹ + 9 + 7⁴ .

It is a Duffinian number.

24397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24391) 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, 363 + ... + 424.

It is an arithmetic number, because the mean of its divisors is an integer number (6304).

2²⁴³⁹⁷ is an apocalyptic number.

It is an amenable number.

24397 is a deficient number, since it is larger than the sum of its proper divisors (819).

24397 is an equidigital number, since it uses as much as digits as its factorization.

24397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its digits is 1512, while the sum is 25.

The square root of 24397 is about 156.1953904570. The cubic root of 24397 is about 29.0031704817.

Subtracting 24397 from its reverse (79342), we obtain a palindrome (54945).

The spelling of 24397 in words is "twenty-four thousand, three hundred ninety-seven".