11661113 has 4 divisors (see below), whose sum is σ = 11881188. Its totient is φ = 11441040.

The previous prime is 11661101. The next prime is 11661119. The reversal of 11661113 is 31116611.

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: 31116611 = 1031 ⋅30181.

It can be written as a sum of positive squares in 2 ways, for example, as 8743849 + 2917264 = 2957^2 + 1708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11661119) 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, 109958 + ... + 110063.

It is an arithmetic number, because the mean of its divisors is an integer number (2970297).

Almost surely, 2^11661113 is an apocalyptic number.

It is an amenable number.

11661113 is a deficient number, since it is larger than the sum of its proper divisors (220075).

11661113 is an equidigital number, since it uses as much as digits as its factorization.

11661113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220074.

The product of its digits is 108, while the sum is 20.

The square root of 11661113 is about 3414.8371849914. The cubic root of 11661113 is about 226.7670765726.

Adding to 11661113 its reverse (31116611), we get a palindrome (42777724).

The spelling of 11661113 in words is "eleven million, six hundred sixty-one thousand, one hundred thirteen".