11719409 has 16 divisors (see below), whose sum is σ = 14071680. Its totient is φ = 9642240.

The previous prime is 11719387. The next prime is 11719427. The reversal of 11719409 is 90491711.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11719409 - 2¹² = 11715313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11719429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2804 + ... + 5594.

It is an arithmetic number, because the mean of its divisors is an integer number (879480).

Almost surely, 2^11719409 is an apocalyptic number.

11719409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11719409 is a deficient number, since it is larger than the sum of its proper divisors (2352271).

11719409 is a wasteful number, since it uses less digits than its factorization.

11719409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 11719409 is about 3423.3622361649. The cubic root of 11719409 is about 227.1443317397.

The spelling of 11719409 in words is "eleven million, seven hundred nineteen thousand, four hundred nine".