687107903 has 2 divisors, whose sum is σ = 687107904. Its totient is φ = 687107902.

The previous prime is 687107891. The next prime is 687107977. The reversal of 687107903 is 309701786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687107903 - 2⁸ = 687107647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687107983) 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, 343553951 + 343553952.

It is an arithmetic number, because the mean of its divisors is an integer number (343553952).

Almost surely, 2^687107903 is an apocalyptic number.

687107903 is a deficient number, since it is larger than the sum of its proper divisors (1).

687107903 is an equidigital number, since it uses as much as digits as its factorization.

687107903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 687107903 is about 26212.7431414570. The cubic root of 687107903 is about 882.4192653795.

The spelling of 687107903 in words is "six hundred eighty-seven million, one hundred seven thousand, nine hundred three".