403420403 has 4 divisors (see below), whose sum is σ = 403461360. Its totient is φ = 403379448.

The previous prime is 403420351. The next prime is 403420427. The reversal of 403420403 is 304024304.

It is a happy number.

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 403420403 - 2²⁶ = 336311539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403420903) 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, 4253 + ... + 28721.

It is an arithmetic number, because the mean of its divisors is an integer number (100865340).

Almost surely, 2^403420403 is an apocalyptic number.

403420403 is a deficient number, since it is larger than the sum of its proper divisors (40957).

403420403 is a wasteful number, since it uses less digits than its factorization.

403420403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40956.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 403420403 is about 20085.3280530839. The cubic root of 403420403 is about 738.9004872831.

Adding to 403420403 its reverse (304024304), we get a palindrome (707444707).

The spelling of 403420403 in words is "four hundred three million, four hundred twenty thousand, four hundred three".