2002403 has 16 divisors (see below), whose sum is σ = 2323776. Its totient is φ = 1710720.

The previous prime is 2002397. The next prime is 2002417. The reversal of 2002403 is 3042002.

It is a cyclic number.

It is not a de Polignac number, because 2002403 - 2⁴ = 2002387 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2002453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10973 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (145236).

2^2002403 is an apocalyptic number.

2002403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2002403 is a deficient number, since it is larger than the sum of its proper divisors (321373).

2002403 is a wasteful number, since it uses less digits than its factorization.

2002403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 2002403 is about 1415.0628961286. The cubic root of 2002403 is about 126.0425446318.

Adding to 2002403 its reverse (3042002), we get a palindrome (5044405).

The spelling of 2002403 in words is "two million, two thousand, four hundred three".