43403 has 2 divisors, whose sum is σ = 43404. Its totient is φ = 43402.

The previous prime is 43399. The next prime is 43411. The reversal of 43403 is 30434.

43403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43403 - 2² = 43399 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21701 + 21702.

It is an arithmetic number, because the mean of its divisors is an integer number (21702).

2⁴³⁴⁰³ is an apocalyptic number.

43403 is a deficient number, since it is larger than the sum of its proper divisors (1).

43403 is an equidigital number, since it uses as much as digits as its factorization.

43403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 43403 is about 208.3338666660. Note that the first 3 decimals coincide. The cubic root of 43403 is about 35.1430876982.

Adding to 43403 its reverse (30434), we get a palindrome (73837).

The spelling of 43403 in words is "forty-three thousand, four hundred three", and thus it is an iban number.