11409903 has 10 divisors (see below), whose sum is σ = 17044544. Its totient is φ = 7606548.

The previous prime is 11409887. The next prime is 11409911. The reversal of 11409903 is 30990411.

It is not a de Polignac number, because 11409903 - 2⁴ = 11409887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409103) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 70351 + ... + 70512.

Almost surely, 2^11409903 is an apocalyptic number.

11409903 is a deficient number, since it is larger than the sum of its proper divisors (5634641).

11409903 is an equidigital number, since it uses as much as digits as its factorization.

11409903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140875 (or 140866 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 11409903 is about 3377.8547926162. The cubic root of 11409903 is about 225.1268617914.

The spelling of 11409903 in words is "eleven million, four hundred nine thousand, nine hundred three".