11809803 has 8 divisors (see below), whose sum is σ = 15797968. Its totient is φ = 7847424.

The previous prime is 11809799. The next prime is 11809807. The reversal of 11809803 is 30890811.

It is an interprime number because it is at equal distance from previous prime (11809799) and next prime (11809807).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11809803 - 2² = 11809799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11809807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5350 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (1974746).

Almost surely, 2^11809803 is an apocalyptic number.

11809803 is a deficient number, since it is larger than the sum of its proper divisors (3988165).

11809803 is a wasteful number, since it uses less digits than its factorization.

11809803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12893.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 11809803 is about 3436.5393930523. The cubic root of 11809803 is about 227.7268389143.

The spelling of 11809803 in words is "eleven million, eight hundred nine thousand, eight hundred three".