12087643639 has 2 divisors, whose sum is σ = 12087643640. Its totient is φ = 12087643638.

The previous prime is 12087643549. The next prime is 12087643709. The reversal of 12087643639 is 93634678021.

It is a strong prime.

It is an emirp because it is prime and its reverse (93634678021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12087643639 - 2¹³ = 12087635447 is a prime.

It is a super-2 number, since 2×12087643639² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12087643592 and 12087643601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12087646639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6043821819 + 6043821820.

It is an arithmetic number, because the mean of its divisors is an integer number (6043821820).

Almost surely, 2^12087643639 is an apocalyptic number.

12087643639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12087643639 is an equidigital number, since it uses as much as digits as its factorization.

12087643639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 12087643639 in words is "twelve billion, eighty-seven million, six hundred forty-three thousand, six hundred thirty-nine".