2011403 has 4 divisors (see below), whose sum is σ = 2049408. Its totient is φ = 1973400.

The previous prime is 2011393. The next prime is 2011409. The reversal of 2011403 is 3041102.

It is a happy number.

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 2011403 - 2⁸ = 2011147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18923 + ... + 19028.

It is an arithmetic number, because the mean of its divisors is an integer number (512352).

2^2011403 is an apocalyptic number.

2011403 is a deficient number, since it is larger than the sum of its proper divisors (38005).

2011403 is an equidigital number, since it uses as much as digits as its factorization.

2011403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38004.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2011403 is about 1418.2394015116. The cubic root of 2011403 is about 126.2310993501.

Adding to 2011403 its reverse (3041102), we get a palindrome (5052505).

The spelling of 2011403 in words is "two million, eleven thousand, four hundred three".