11986643 has 2 divisors, whose sum is σ = 11986644. Its totient is φ = 11986642.

The previous prime is 11986627. The next prime is 11986661. The reversal of 11986643 is 34668911.

It is a weak prime.

It is an emirp because it is prime and its reverse (34668911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11986643 - 2⁴ = 11986627 is a prime.

It is a super-2 number, since 2×11986643² = 287359220818898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11986597 and 11986606.

It is not a weakly prime, because it can be changed into another prime (11986693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5993321 + 5993322.

It is an arithmetic number, because the mean of its divisors is an integer number (5993322).

Almost surely, 2^11986643 is an apocalyptic number.

11986643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11986643 is an equidigital number, since it uses as much as digits as its factorization.

11986643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 11986643 is about 3462.1731614695. The cubic root of 11986643 is about 228.8578728182.

The spelling of 11986643 in words is "eleven million, nine hundred eighty-six thousand, six hundred forty-three".