11963639 has 2 divisors, whose sum is σ = 11963640. Its totient is φ = 11963638.

The previous prime is 11963599. The next prime is 11963641. The reversal of 11963639 is 93636911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11963639 - 2¹² = 11959543 is a prime.

Together with 11963641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11963339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5981819 + 5981820.

It is an arithmetic number, because the mean of its divisors is an integer number (5981820).

Almost surely, 2^11963639 is an apocalyptic number.

11963639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11963639 is an equidigital number, since it uses as much as digits as its factorization.

11963639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 11963639 is about 3458.8493751535. The cubic root of 11963639 is about 228.7113759227.

The spelling of 11963639 in words is "eleven million, nine hundred sixty-three thousand, six hundred thirty-nine".