400323403 has 4 divisors (see below), whose sum is σ = 400363600. Its totient is φ = 400283208.

The previous prime is 400323397. The next prime is 400323433. The reversal of 400323403 is 304323004.

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 400323403 - 2⁹ = 400322891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400323433) 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, 7201 + ... + 29197.

It is an arithmetic number, because the mean of its divisors is an integer number (100090900).

Almost surely, 2^400323403 is an apocalyptic number.

400323403 is a deficient number, since it is larger than the sum of its proper divisors (40197).

400323403 is a wasteful number, since it uses less digits than its factorization.

400323403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40196.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 400323403 is about 20008.0834414494. The cubic root of 400323403 is about 737.0048173765.

Adding to 400323403 its reverse (304323004), we get a palindrome (704646407).

The spelling of 400323403 in words is "four hundred million, three hundred twenty-three thousand, four hundred three".