11959919 has 4 divisors (see below), whose sum is σ = 12372360. Its totient is φ = 11547480.

The previous prime is 11959903. The next prime is 11959921. The reversal of 11959919 is 91995911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11959919 - 2⁴ = 11959903 is a prime.

It is a super-2 number, since 2×11959919² = 286079324973122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11959919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11959939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206177 + ... + 206234.

It is an arithmetic number, because the mean of its divisors is an integer number (3093090).

Almost surely, 2^11959919 is an apocalyptic number.

11959919 is a deficient number, since it is larger than the sum of its proper divisors (412441).

11959919 is an equidigital number, since it uses as much as digits as its factorization.

11959919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412440.

The product of its digits is 32805, while the sum is 44.

The square root of 11959919 is about 3458.3115822609. The cubic root of 11959919 is about 228.6876681273.

The spelling of 11959919 in words is "eleven million, nine hundred fifty-nine thousand, nine hundred nineteen".