687439765223 has 2 divisors, whose sum is σ = 687439765224. Its totient is φ = 687439765222.

The previous prime is 687439765219. The next prime is 687439765231. The reversal of 687439765223 is 322567934786.

687439765223 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 687439765223 - 2² = 687439765219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687439765253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343719882611 + 343719882612.

It is an arithmetic number, because the mean of its divisors is an integer number (343719882612).

Almost surely, 2^687439765223 is an apocalyptic number.

687439765223 is a deficient number, since it is larger than the sum of its proper divisors (1).

687439765223 is an equidigital number, since it uses as much as digits as its factorization.

687439765223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 62.

The spelling of 687439765223 in words is "six hundred eighty-seven billion, four hundred thirty-nine million, seven hundred sixty-five thousand, two hundred twenty-three".