11782109 has 4 divisors (see below), whose sum is σ = 12402240. Its totient is φ = 11161980.

The previous prime is 11782103. The next prime is 11782117. The reversal of 11782109 is 90128711.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11782109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11782103) 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, 310037 + ... + 310074.

It is an arithmetic number, because the mean of its divisors is an integer number (3100560).

Almost surely, 2^11782109 is an apocalyptic number.

11782109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11782109 is a deficient number, since it is larger than the sum of its proper divisors (620131).

11782109 is an equidigital number, since it uses as much as digits as its factorization.

11782109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620130.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 11782109 is about 3432.5076838953. The cubic root of 11782109 is about 227.5486930349.

The spelling of 11782109 in words is "eleven million, seven hundred eighty-two thousand, one hundred nine".