687899603 has 2 divisors, whose sum is σ = 687899604. Its totient is φ = 687899602.

The previous prime is 687899593. The next prime is 687899629. The reversal of 687899603 is 306998786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687899603 - 2⁶ = 687899539 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (687899803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343949801 + 343949802.

It is an arithmetic number, because the mean of its divisors is an integer number (343949802).

Almost surely, 2^687899603 is an apocalyptic number.

687899603 is a deficient number, since it is larger than the sum of its proper divisors (1).

687899603 is an equidigital number, since it uses as much as digits as its factorization.

687899603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 687899603 is about 26227.8402275140. The cubic root of 687899603 is about 882.7580492313.

The spelling of 687899603 in words is "six hundred eighty-seven million, eight hundred ninety-nine thousand, six hundred three".