11709861 has 8 divisors (see below), whose sum is σ = 15648864. Its totient is φ = 7788720.

The previous prime is 11709853. The next prime is 11709883. The reversal of 11709861 is 16890711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11709861 - 2³ = 11709853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11709361) 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 7 ways as a sum of consecutive naturals, for example, 2851 + ... + 5616.

It is an arithmetic number, because the mean of its divisors is an integer number (1956108).

Almost surely, 2^11709861 is an apocalyptic number.

It is an amenable number.

11709861 is a deficient number, since it is larger than the sum of its proper divisors (3939003).

11709861 is an equidigital number, since it uses as much as digits as its factorization.

11709861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8931.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 11709861 is about 3421.9674165602. The cubic root of 11709861 is about 227.0826288749.

The spelling of 11709861 in words is "eleven million, seven hundred nine thousand, eight hundred sixty-one".