403943 has 4 divisors (see below), whose sum is σ = 410040. Its totient is φ = 397848.

The previous prime is 403933. The next prime is 403951. The reversal of 403943 is 349304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 403943 - 2⁸ = 403687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2948 + ... + 3081.

It is an arithmetic number, because the mean of its divisors is an integer number (102510).

2⁴⁰³⁹⁴³ is an apocalyptic number.

403943 is a deficient number, since it is larger than the sum of its proper divisors (6097).

403943 is an equidigital number, since it uses as much as digits as its factorization.

403943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 403943 is about 635.5651028809. The cubic root of 403943 is about 73.9219410632.

The spelling of 403943 in words is "four hundred three thousand, nine hundred forty-three".