687455369591 has 2 divisors, whose sum is σ = 687455369592. Its totient is φ = 687455369590.

The previous prime is 687455369563. The next prime is 687455369593. The reversal of 687455369591 is 195963554786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687455369591 - 2⁶ = 687455369527 is a prime.

Together with 687455369593, 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 (687455369593) 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, 343727684795 + 343727684796.

It is an arithmetic number, because the mean of its divisors is an integer number (343727684796).

Almost surely, 2^687455369591 is an apocalyptic number.

687455369591 is a deficient number, since it is larger than the sum of its proper divisors (1).

687455369591 is an equidigital number, since it uses as much as digits as its factorization.

687455369591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944000, while the sum is 68.

The spelling of 687455369591 in words is "six hundred eighty-seven billion, four hundred fifty-five million, three hundred sixty-nine thousand, five hundred ninety-one".