423203403 has 16 divisors (see below), whose sum is σ = 645336320. Its totient is φ = 241659936.

The previous prime is 423203399. The next prime is 423203437. The reversal of 423203403 is 304302324.

It is not a de Polignac number, because 423203403 - 2² = 423203399 is a prime.

It is a super-2 number, since 2×423203403² = 358202240621560818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423203403.

It is not an unprimeable number, because it can be changed into a prime (423203453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27228 + ... + 39846.

It is an arithmetic number, because the mean of its divisors is an integer number (40333520).

Almost surely, 2^423203403 is an apocalyptic number.

423203403 is a deficient number, since it is larger than the sum of its proper divisors (222132917).

423203403 is a wasteful number, since it uses less digits than its factorization.

423203403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 423203403 is about 20571.9081030419. The cubic root of 423203403 is about 750.7863769713.

Adding to 423203403 its reverse (304302324), we get a palindrome (727505727).

The spelling of 423203403 in words is "four hundred twenty-three million, two hundred three thousand, four hundred three".