11988643 has 2 divisors, whose sum is σ = 11988644. Its totient is φ = 11988642.

The previous prime is 11988637. The next prime is 11988649. The reversal of 11988643 is 34688911.

It is a balanced prime because it is at equal distance from previous prime (11988637) and next prime (11988649).

It is a cyclic number.

It is not a de Polignac number, because 11988643 - 2⁹ = 11988131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11988596 and 11988605.

It is not a weakly prime, because it can be changed into another prime (11988649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994321 + 5994322.

It is an arithmetic number, because the mean of its divisors is an integer number (5994322).

Almost surely, 2^11988643 is an apocalyptic number.

11988643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11988643 is an equidigital number, since it uses as much as digits as its factorization.

11988643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 11988643 is about 3462.4619853509. The cubic root of 11988643 is about 228.8706006045.

The spelling of 11988643 in words is "eleven million, nine hundred eighty-eight thousand, six hundred forty-three".