11802109 has 4 divisors (see below), whose sum is σ = 12875040. Its totient is φ = 10729180.

The previous prime is 11802107. The next prime is 11802113. The reversal of 11802109 is 90120811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11802109 - 2¹ = 11802107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11802109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11802107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536449 + ... + 536470.

It is an arithmetic number, because the mean of its divisors is an integer number (3218760).

Almost surely, 2^11802109 is an apocalyptic number.

It is an amenable number.

11802109 is a deficient number, since it is larger than the sum of its proper divisors (1072931).

11802109 is a wasteful number, since it uses less digits than its factorization.

11802109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072930.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 11802109 is about 3435.4197705666. The cubic root of 11802109 is about 227.6773740492.

It can be divided in two parts, 11802 and 109, that added together give a palindrome (11911).

The spelling of 11802109 in words is "eleven million, eight hundred two thousand, one hundred nine".