11161909 has 4 divisors (see below), whose sum is σ = 12176640. Its totient is φ = 10147180.

The previous prime is 11161907. The next prime is 11161921. The reversal of 11161909 is 90916111.

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 not a de Polignac number, because 11161909 - 2¹ = 11161907 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 (11161907) 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, 507349 + ... + 507370.

It is an arithmetic number, because the mean of its divisors is an integer number (3044160).

Almost surely, 2^11161909 is an apocalyptic number.

It is an amenable number.

11161909 is a deficient number, since it is larger than the sum of its proper divisors (1014731).

11161909 is a wasteful number, since it uses less digits than its factorization.

11161909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014730.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 11161909 is about 3340.9443275816. The cubic root of 11161909 is about 223.4838575859.

It can be divided in two parts, 1116 and 1909, that added together give a square (3025 = 55²).

The spelling of 11161909 in words is "eleven million, one hundred sixty-one thousand, nine hundred nine".