11916859 has 4 divisors (see below), whose sum is σ = 11982880. Its totient is φ = 11850840.

The previous prime is 11916851. The next prime is 11916869. The reversal of 11916859 is 95861911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95861911 = 1283 ⋅74717.

It is a cyclic number.

It is not a de Polignac number, because 11916859 - 2³ = 11916851 is a prime.

It is a super-3 number, since 3×11916859³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11916851) 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, 32739 + ... + 33100.

It is an arithmetic number, because the mean of its divisors is an integer number (2995720).

Almost surely, 2^11916859 is an apocalyptic number.

11916859 is a deficient number, since it is larger than the sum of its proper divisors (66021).

11916859 is an equidigital number, since it uses as much as digits as its factorization.

11916859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66020.

The product of its digits is 19440, while the sum is 40.

The square root of 11916859 is about 3452.0803872448. The cubic root of 11916859 is about 228.4128855358.

The spelling of 11916859 in words is "eleven million, nine hundred sixteen thousand, eight hundred fifty-nine".