687397003 has 2 divisors, whose sum is σ = 687397004. Its totient is φ = 687397002.

The previous prime is 687397001. The next prime is 687397013. The reversal of 687397003 is 300793786.

687397003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687397003 - 2¹ = 687397001 is a prime.

Together with 687397001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (687397001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343698501 + 343698502.

It is an arithmetic number, because the mean of its divisors is an integer number (343698502).

Almost surely, 2^687397003 is an apocalyptic number.

687397003 is a deficient number, since it is larger than the sum of its proper divisors (1).

687397003 is an equidigital number, since it uses as much as digits as its factorization.

687397003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 687397003 is about 26218.2570549608. The cubic root of 687397003 is about 882.5430070500.

The spelling of 687397003 in words is "six hundred eighty-seven million, three hundred ninety-seven thousand, three".