11987113 has 2 divisors, whose sum is σ = 11987114. Its totient is φ = 11987112.

The previous prime is 11987083. The next prime is 11987141. The reversal of 11987113 is 31178911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 944784 = 3323^2 + 972^2 .

It is a cyclic number.

It is not a de Polignac number, because 11987113 - 2¹³ = 11978921 is a prime.

It is not a weakly prime, because it can be changed into another prime (11987413) 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 as a sum of consecutive naturals, namely, 5993556 + 5993557.

It is an arithmetic number, because the mean of its divisors is an integer number (5993557).

Almost surely, 2^11987113 is an apocalyptic number.

It is an amenable number.

11987113 is a deficient number, since it is larger than the sum of its proper divisors (1).

11987113 is an equidigital number, since it uses as much as digits as its factorization.

11987113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 31.

The square root of 11987113 is about 3462.2410372474. The cubic root of 11987113 is about 228.8608639752.

It can be divided in two parts, 11987 and 113, that multiplied together give a palindrome (1354531).

The spelling of 11987113 in words is "eleven million, nine hundred eighty-seven thousand, one hundred thirteen".