11649109 has 18 divisors (see below), whose sum is σ = 13062966. Its totient is φ = 10383120.

The previous prime is 11649107. The next prime is 11649119. The reversal of 11649109 is 90194611.

It can be written as a sum of positive squares in only one way, i.e., 6874884 + 4774225 = 2622^2 + 2185^2 .

It is not a de Polignac number, because 11649109 - 2¹ = 11649107 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 (11649101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 190939 + ... + 190999.

Almost surely, 2^11649109 is an apocalyptic number.

11649109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11649109 is a deficient number, since it is larger than the sum of its proper divisors (1413857).

11649109 is an equidigital number, since it uses as much as digits as its factorization.

11649109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11649109 is about 3413.0791083712. The cubic root of 11649109 is about 226.6892381886.

The spelling of 11649109 in words is "eleven million, six hundred forty-nine thousand, one hundred nine".