687144259 has 2 divisors, whose sum is σ = 687144260. Its totient is φ = 687144258.

The previous prime is 687144247. The next prime is 687144281. The reversal of 687144259 is 952441786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687144259 - 2¹⁹ = 686619971 is a prime.

It is not a weakly prime, because it can be changed into another prime (687144229) 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, 343572129 + 343572130.

It is an arithmetic number, because the mean of its divisors is an integer number (343572130).

Almost surely, 2^687144259 is an apocalyptic number.

687144259 is a deficient number, since it is larger than the sum of its proper divisors (1).

687144259 is an equidigital number, since it uses as much as digits as its factorization.

687144259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 687144259 is about 26213.4366117837. The cubic root of 687144259 is about 882.4348285193.

The spelling of 687144259 in words is "six hundred eighty-seven million, one hundred forty-four thousand, two hundred fifty-nine".