2403943 has 4 divisors (see below), whose sum is σ = 2407048. Its totient is φ = 2400840.

The previous prime is 2403941. The next prime is 2403959. The reversal of 2403943 is 3493042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2403943 - 2¹ = 2403941 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 4⁷ + 0 + 3⁵ + 9⁴ + 4⁹ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403941) 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, 673 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (601762).

2^2403943 is an apocalyptic number.

2403943 is a deficient number, since it is larger than the sum of its proper divisors (3105).

2403943 is a wasteful number, since it uses less digits than its factorization.

2403943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 2403943 is about 1550.4654139967. The cubic root of 2403943 is about 133.9598714027.

Adding to 2403943 its reverse (3493042), we get a palindrome (5896985).

The spelling of 2403943 in words is "two million, four hundred three thousand, nine hundred forty-three".