687683753 has 2 divisors, whose sum is σ = 687683754. Its totient is φ = 687683752.

The previous prime is 687683749. The next prime is 687683783. The reversal of 687683753 is 357386786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549574249 + 138109504 = 23443^2 + 11752^2 .

It is a cyclic number.

It is not a de Polignac number, because 687683753 - 2² = 687683749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687683695 and 687683704.

It is not a weakly prime, because it can be changed into another prime (687683783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343841876 + 343841877.

It is an arithmetic number, because the mean of its divisors is an integer number (343841877).

Almost surely, 2^687683753 is an apocalyptic number.

It is an amenable number.

687683753 is a deficient number, since it is larger than the sum of its proper divisors (1).

687683753 is an equidigital number, since it uses as much as digits as its factorization.

687683753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 53.

The square root of 687683753 is about 26223.7250023714. The cubic root of 687683753 is about 882.6657085965.

The spelling of 687683753 in words is "six hundred eighty-seven million, six hundred eighty-three thousand, seven hundred fifty-three".