11579999 has 4 divisors (see below), whose sum is σ = 11862480. Its totient is φ = 11297520.

The previous prime is 11579993. The next prime is 11580011. The reversal of 11579999 is 99997511.

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 11579999 - 2⁴ = 11579983 is a prime.

It is a Duffinian number.

11579999 is a modest number, since divided by 9999 gives 1157 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11579993) 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 3 ways as a sum of consecutive naturals, for example, 141179 + ... + 141260.

It is an arithmetic number, because the mean of its divisors is an integer number (2965620).

Almost surely, 2^11579999 is an apocalyptic number.

11579999 is a deficient number, since it is larger than the sum of its proper divisors (282481).

11579999 is an equidigital number, since it uses as much as digits as its factorization.

11579999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282480.

The product of its digits is 229635, while the sum is 50.

The square root of 11579999 is about 3402.9397585029. The cubic root of 11579999 is about 226.2400600010.

The spelling of 11579999 in words is "eleven million, five hundred seventy-nine thousand, nine hundred ninety-nine".