11641909 has 4 divisors (see below), whose sum is σ = 11925900. Its totient is φ = 11357920.

The previous prime is 11641901. The next prime is 11641919. The reversal of 11641909 is 90914611.

11641909 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 7273809 = 2090^2 + 2697^2 .

It is a cyclic number.

It is not a de Polignac number, because 11641909 - 2³ = 11641901 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 (11641901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141934 + ... + 142015.

It is an arithmetic number, because the mean of its divisors is an integer number (2981475).

Almost surely, 2^11641909 is an apocalyptic number.

It is an amenable number.

11641909 is a deficient number, since it is larger than the sum of its proper divisors (283991).

11641909 is an equidigital number, since it uses as much as digits as its factorization.

11641909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283990.

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

The square root of 11641909 is about 3412.0241792813. The cubic root of 11641909 is about 226.6425250624.

It can be divided in two parts, 116 and 41909, that added together give a square (42025 = 205²).

The spelling of 11641909 in words is "eleven million, six hundred forty-one thousand, nine hundred nine".