403242403 has 4 divisors (see below), whose sum is σ = 410077080. Its totient is φ = 396407728.

The previous prime is 403242373. The next prime is 403242439. The reversal of 403242403 is 304242304.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403242403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403242493) 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, 3417250 + ... + 3417367.

It is an arithmetic number, because the mean of its divisors is an integer number (102519270).

Almost surely, 2^403242403 is an apocalyptic number.

403242403 is a deficient number, since it is larger than the sum of its proper divisors (6834677).

403242403 is an equidigital number, since it uses as much as digits as its factorization.

403242403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6834676.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 403242403 is about 20080.8964690325. The cubic root of 403242403 is about 738.7917969982.

Adding to 403242403 its reverse (304242304), we get a palindrome (707484707).

Subtracting from 403242403 its reverse (304242304), we obtain a palindrome (99000099).

The spelling of 403242403 in words is "four hundred three million, two hundred forty-two thousand, four hundred three".