11871113 has 4 divisors (see below), whose sum is σ = 11902020. Its totient is φ = 11840208.

The previous prime is 11871107. The next prime is 11871133. The reversal of 11871113 is 31117811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31117811 = 41 ⋅758971.

It can be written as a sum of positive squares in 2 ways, for example, as 868624 + 11002489 = 932^2 + 3317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11871113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11871103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14870 + ... + 15647.

It is an arithmetic number, because the mean of its divisors is an integer number (2975505).

Almost surely, 2^11871113 is an apocalyptic number.

It is an amenable number.

11871113 is a deficient number, since it is larger than the sum of its proper divisors (30907).

11871113 is an equidigital number, since it uses as much as digits as its factorization.

11871113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906.

The product of its digits is 168, while the sum is 23.

The square root of 11871113 is about 3445.4481566264. The cubic root of 11871113 is about 228.1202364177.

Adding to 11871113 its reverse (31117811), we get a palindrome (42988924).

The spelling of 11871113 in words is "eleven million, eight hundred seventy-one thousand, one hundred thirteen".