11791999 has 8 divisors (see below), whose sum is σ = 12616128. Its totient is φ = 10982400.

The previous prime is 11791991. The next prime is 11792029. The reversal of 11791999 is 99919711.

It is a happy number.

11791999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11791999 - 2³ = 11791991 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 (11791991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927 + ... + 5224.

It is an arithmetic number, because the mean of its divisors is an integer number (1577016).

Almost surely, 2^11791999 is an apocalyptic number.

11791999 is a deficient number, since it is larger than the sum of its proper divisors (824129).

11791999 is an equidigital number, since it uses as much as digits as its factorization.

11791999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7265.

The product of its digits is 45927, while the sum is 46.

The square root of 11791999 is about 3433.9480194086. The cubic root of 11791999 is about 227.6123439819.

The spelling of 11791999 in words is "eleven million, seven hundred ninety-one thousand, nine hundred ninety-nine".