11506613 has 4 divisors (see below), whose sum is σ = 11695308. Its totient is φ = 11317920.

The previous prime is 11506567. The next prime is 11506619. The reversal of 11506613 is 31660511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31660511 = 17 ⋅1862383.

It can be written as a sum of positive squares in 2 ways, for example, as 2007889 + 9498724 = 1417^2 + 3082^2 .

It is a cyclic number.

It is not a de Polignac number, because 11506613 - 2¹⁴ = 11490229 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 (11506619) 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, 94256 + ... + 94377.

It is an arithmetic number, because the mean of its divisors is an integer number (2923827).

Almost surely, 2^11506613 is an apocalyptic number.

It is an amenable number.

11506613 is a deficient number, since it is larger than the sum of its proper divisors (188695).

11506613 is an equidigital number, since it uses as much as digits as its factorization.

11506613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188694.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11506613 is about 3392.1398850873. The cubic root of 11506613 is about 225.7611293465.

The spelling of 11506613 in words is "eleven million, five hundred six thousand, six hundred thirteen".