11071909 has 4 divisors (see below), whose sum is σ = 11083680. Its totient is φ = 11060140.

The previous prime is 11071883. The next prime is 11071943. The reversal of 11071909 is 90917011.

11071909 is digitally balanced in base 2, 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, 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 11071909 - 2⁵ = 11071877 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 (11071969) 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, 4339 + ... + 6400.

It is an arithmetic number, because the mean of its divisors is an integer number (2770920).

Almost surely, 2^11071909 is an apocalyptic number.

It is an amenable number.

11071909 is a deficient number, since it is larger than the sum of its proper divisors (11771).

11071909 is a wasteful number, since it uses less digits than its factorization.

11071909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11770.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 11071909 is about 3327.4478207780. The cubic root of 11071909 is about 222.8815756023.

The spelling of 11071909 in words is "eleven million, seventy-one thousand, nine hundred nine".