11143613 has 4 divisors (see below), whose sum is σ = 12000828. Its totient is φ = 10286400.

The previous prime is 11143607. The next prime is 11143631. The reversal of 11143613 is 31634111.

11143613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1737124 + 9406489 = 1318^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 11143613 - 2⁴ = 11143597 is a prime.

It is a super-2 number, since 2×11143613² = 248360221387538, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143603) 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, 428588 + ... + 428613.

It is an arithmetic number, because the mean of its divisors is an integer number (3000207).

Almost surely, 2^11143613 is an apocalyptic number.

11143613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11143613 is a deficient number, since it is larger than the sum of its proper divisors (857215).

11143613 is an equidigital number, since it uses as much as digits as its factorization.

11143613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857214.

The product of its digits is 216, while the sum is 20.

The square root of 11143613 is about 3338.2050566135. The cubic root of 11143613 is about 223.3616832405.

Adding to 11143613 its reverse (31634111), we get a palindrome (42777724).

The spelling of 11143613 in words is "eleven million, one hundred forty-three thousand, six hundred thirteen".