400403103 has 4 divisors (see below), whose sum is σ = 533870808. Its totient is φ = 266935400.

The previous prime is 400403077. The next prime is 400403117. The reversal of 400403103 is 301304004.

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

It is a cyclic number.

It is not a de Polignac number, because 400403103 - 2⁵ = 400403071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400403123) 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, 66733848 + ... + 66733853.

It is an arithmetic number, because the mean of its divisors is an integer number (133467702).

Almost surely, 2^400403103 is an apocalyptic number.

400403103 is a deficient number, since it is larger than the sum of its proper divisors (133467705).

400403103 is a wasteful number, since it uses less digits than its factorization.

400403103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133467704.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400403103 is about 20010.0750373406. The cubic root of 400403103 is about 737.0537239903.

Adding to 400403103 its reverse (301304004), we get a palindrome (701707107).

Subtracting from 400403103 its reverse (301304004), we obtain a palindrome (99099099).

The spelling of 400403103 in words is "four hundred million, four hundred three thousand, one hundred three".