687144203 has 2 divisors, whose sum is σ = 687144204. Its totient is φ = 687144202.

The previous prime is 687144197. The next prime is 687144221. The reversal of 687144203 is 302441786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687144203 - 2²² = 682949899 is a prime.

It is not a weakly prime, because it can be changed into another prime (687144223) 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, 343572101 + 343572102.

It is an arithmetic number, because the mean of its divisors is an integer number (343572102).

Almost surely, 2^687144203 is an apocalyptic number.

687144203 is a deficient number, since it is larger than the sum of its proper divisors (1).

687144203 is an equidigital number, since it uses as much as digits as its factorization.

687144203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 687144203 is about 26213.4355436291. The cubic root of 687144203 is about 882.4348045474.

Adding to 687144203 its reverse (302441786), we get a palindrome (989585989).

The spelling of 687144203 in words is "six hundred eighty-seven million, one hundred forty-four thousand, two hundred three".