687555383 has 2 divisors, whose sum is σ = 687555384. Its totient is φ = 687555382.

The previous prime is 687555343. The next prime is 687555431. The reversal of 687555383 is 383555786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687555383 - 2¹² = 687551287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687555343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343777691 + 343777692.

It is an arithmetic number, because the mean of its divisors is an integer number (343777692).

Almost surely, 2^687555383 is an apocalyptic number.

687555383 is a deficient number, since it is larger than the sum of its proper divisors (1).

687555383 is an equidigital number, since it uses as much as digits as its factorization.

687555383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024000, while the sum is 50.

The square root of 687555383 is about 26221.2772953569. The cubic root of 687555383 is about 882.6107827445.

The spelling of 687555383 in words is "six hundred eighty-seven million, five hundred fifty-five thousand, three hundred eighty-three".