11984639 has 2 divisors, whose sum is σ = 11984640. Its totient is φ = 11984638.

The previous prime is 11984597. The next prime is 11984653. The reversal of 11984639 is 93648911.

11984639 is nontrivially palindromic in base 3.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11984639 - 2¹² = 11980543 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11984596 and 11984605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11984699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992319 + 5992320.

It is an arithmetic number, because the mean of its divisors is an integer number (5992320).

Almost surely, 2^11984639 is an apocalyptic number.

11984639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11984639 is an equidigital number, since it uses as much as digits as its factorization.

11984639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 11984639 is about 3461.8837357716. The cubic root of 11984639 is about 228.8451181562.

The spelling of 11984639 in words is "eleven million, nine hundred eighty-four thousand, six hundred thirty-nine".