687563152477 has 2 divisors, whose sum is σ = 687563152478. Its totient is φ = 687563152476.

The previous prime is 687563152469. The next prime is 687563152481. The reversal of 687563152477 is 774251365786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676981738521 + 10581413956 = 822789^2 + 102866^2 .

It is a cyclic number.

It is not a de Polignac number, because 687563152477 - 2³ = 687563152469 is a prime.

It is a super-2 number, since 2×687563152477² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687563152777) 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, 343781576238 + 343781576239.

It is an arithmetic number, because the mean of its divisors is an integer number (343781576239).

Almost surely, 2^687563152477 is an apocalyptic number.

It is an amenable number.

687563152477 is a deficient number, since it is larger than the sum of its proper divisors (1).

687563152477 is an equidigital number, since it uses as much as digits as its factorization.

687563152477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59270400, while the sum is 61.

The spelling of 687563152477 in words is "six hundred eighty-seven billion, five hundred sixty-three million, one hundred fifty-two thousand, four hundred seventy-seven".