11506579 has 4 divisors (see below), whose sum is σ = 13150384. Its totient is φ = 9862776.

The previous prime is 11506567. The next prime is 11506619. The reversal of 11506579 is 97560511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97560511 = 127 ⋅768193.

It is not a de Polignac number, because 11506579 - 2¹⁹ = 10982291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11506679) 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, 821892 + ... + 821905.

It is an arithmetic number, because the mean of its divisors is an integer number (3287596).

Almost surely, 2^11506579 is an apocalyptic number.

11506579 is a deficient number, since it is larger than the sum of its proper divisors (1643805).

11506579 is an equidigital number, since it uses as much as digits as its factorization.

11506579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643804.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 11506579 is about 3392.1348734978. The cubic root of 11506579 is about 225.7609069849.

The spelling of 11506579 in words is "eleven million, five hundred six thousand, five hundred seventy-nine".