11287613 has 4 divisors (see below), whose sum is σ = 11317020. Its totient is φ = 11258208.

The previous prime is 11287607. The next prime is 11287631. The reversal of 11287613 is 31678211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 8922169 = 1538^2 + 2987^2 .

It is a cyclic number.

It is not a de Polignac number, because 11287613 - 2⁴ = 11287597 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 (11287663) 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, 14120 + ... + 14897.

It is an arithmetic number, because the mean of its divisors is an integer number (2829255).

Almost surely, 2^11287613 is an apocalyptic number.

It is an amenable number.

11287613 is a deficient number, since it is larger than the sum of its proper divisors (29407).

11287613 is an equidigital number, since it uses as much as digits as its factorization.

11287613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29406.

The product of its digits is 2016, while the sum is 29.

The square root of 11287613 is about 3359.7043024647. The cubic root of 11287613 is about 224.3196766948.

The spelling of 11287613 in words is "eleven million, two hundred eighty-seven thousand, six hundred thirteen".