687822228733 has 2 divisors, whose sum is σ = 687822228734. Its totient is φ = 687822228732.

The previous prime is 687822228721. The next prime is 687822228787. The reversal of 687822228733 is 337822228786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687378620889 + 443607844 = 829083^2 + 21062^2 .

It is a cyclic number.

It is not a de Polignac number, because 687822228733 - 2⁹ = 687822228221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687822228713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343911114366 + 343911114367.

It is an arithmetic number, because the mean of its divisors is an integer number (343911114367).

Almost surely, 2^687822228733 is an apocalyptic number.

It is an amenable number.

687822228733 is a deficient number, since it is larger than the sum of its proper divisors (1).

687822228733 is an equidigital number, since it uses as much as digits as its factorization.

687822228733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 58.

The spelling of 687822228733 in words is "six hundred eighty-seven billion, eight hundred twenty-two million, two hundred twenty-eight thousand, seven hundred thirty-three".