687016403 has 2 divisors, whose sum is σ = 687016404. Its totient is φ = 687016402.

The previous prime is 687016399. The next prime is 687016423. The reversal of 687016403 is 304610786.

687016403 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 687016403 - 2² = 687016399 is a prime.

It is not a weakly prime, because it can be changed into another prime (687016423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343508201 + 343508202.

It is an arithmetic number, because the mean of its divisors is an integer number (343508202).

Almost surely, 2^687016403 is an apocalyptic number.

687016403 is a deficient number, since it is larger than the sum of its proper divisors (1).

687016403 is an equidigital number, since it uses as much as digits as its factorization.

687016403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 687016403 is about 26210.9977490366. The cubic root of 687016403 is about 882.3800939739.

The spelling of 687016403 in words is "six hundred eighty-seven million, sixteen thousand, four hundred three".