11813709 has 4 divisors (see below), whose sum is σ = 15751616. Its totient is φ = 7875804.

The previous prime is 11813707. The next prime is 11813713. The reversal of 11813709 is 90731811.

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 not a de Polignac number, because 11813709 - 2¹ = 11813707 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 (11813707) 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, 1968949 + ... + 1968954.

It is an arithmetic number, because the mean of its divisors is an integer number (3937904).

Almost surely, 2^11813709 is an apocalyptic number.

It is an amenable number.

11813709 is a deficient number, since it is larger than the sum of its proper divisors (3937907).

11813709 is an equidigital number, since it uses as much as digits as its factorization.

11813709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937906.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 11813709 is about 3437.1076503363. The cubic root of 11813709 is about 227.7519424374.

The spelling of 11813709 in words is "eleven million, eight hundred thirteen thousand, seven hundred nine".