11591279 has 4 divisors (see below), whose sum is σ = 13247184. Its totient is φ = 9935376.

The previous prime is 11591269. The next prime is 11591299. The reversal of 11591279 is 97219511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97219511 = 97 ⋅1002263.

It is a cyclic number.

It is not a de Polignac number, because 11591279 - 2¹⁶ = 11525743 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 (11591219) 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, 827942 + ... + 827955.

It is an arithmetic number, because the mean of its divisors is an integer number (3311796).

Almost surely, 2^11591279 is an apocalyptic number.

11591279 is a deficient number, since it is larger than the sum of its proper divisors (1655905).

11591279 is an equidigital number, since it uses as much as digits as its factorization.

11591279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655904.

The product of its digits is 5670, while the sum is 35.

The square root of 11591279 is about 3404.5967455780. The cubic root of 11591279 is about 226.3134958076.

The spelling of 11591279 in words is "eleven million, five hundred ninety-one thousand, two hundred seventy-nine".