11673571687 has 2 divisors, whose sum is σ = 11673571688. Its totient is φ = 11673571686.

The previous prime is 11673571661. The next prime is 11673571697. The reversal of 11673571687 is 78617537611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11673571687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11673571607) 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, 5836785843 + 5836785844.

It is an arithmetic number, because the mean of its divisors is an integer number (5836785844).

Almost surely, 2^11673571687 is an apocalyptic number.

11673571687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11673571687 is an equidigital number, since it uses as much as digits as its factorization.

11673571687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 52.

The spelling of 11673571687 in words is "eleven billion, six hundred seventy-three million, five hundred seventy-one thousand, six hundred eighty-seven".