43397 has 2 divisors, whose sum is σ = 43398. Its totient is φ = 43396.

The previous prime is 43391. The next prime is 43399. The reversal of 43397 is 79334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42436 + 961 = 206^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 43397 - 2¹⁰ = 42373 is a prime.

Together with 43399, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21698 + 21699.

It is an arithmetic number, because the mean of its divisors is an integer number (21699).

2⁴³³⁹⁷ is an apocalyptic number.

It is an amenable number.

43397 is a deficient number, since it is larger than the sum of its proper divisors (1).

43397 is an equidigital number, since it uses as much as digits as its factorization.

43397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 26.

The square root of 43397 is about 208.3194662052. The cubic root of 43397 is about 35.1414682384.

Subtracting 43397 from its reverse (79334), we obtain a cube (35937 = 33³).

It can be divided in two parts, 43 and 397, that multiplied together give a palindrome (17071).

The spelling of 43397 in words is "forty-three thousand, three hundred ninety-seven".