1003400403 has 16 divisors (see below), whose sum is σ = 1359236736. Its totient is φ = 658290240.

The previous prime is 1003400389. The next prime is 1003400423. The reversal of 1003400403 is 3040043001.

It is not a de Polignac number, because 1003400403 - 2⁵ = 1003400371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1003400423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97368 + ... + 107178.

It is an arithmetic number, because the mean of its divisors is an integer number (84952296).

Almost surely, 2^1003400403 is an apocalyptic number.

1003400403 is a deficient number, since it is larger than the sum of its proper divisors (355836333).

1003400403 is an equidigital number, since it uses as much as digits as its factorization.

1003400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10354.

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

The square root of 1003400403 is about 31676.4960656951. The cubic root of 1003400403 is about 1001.1321853393.

Adding to 1003400403 its reverse (3040043001), we get a palindrome (4043443404).

The spelling of 1003400403 in words is "one billion, three million, four hundred thousand, four hundred three".