687918628683053 has 2 divisors, whose sum is σ = 687918628683054. Its totient is φ = 687918628683052.

The previous prime is 687918628682963. The next prime is 687918628683071. The reversal of 687918628683053 is 350386826819786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572497404978724 + 115421223704329 = 23926918^2 + 10743427^2 .

It is a cyclic number.

It is not a de Polignac number, because 687918628683053 - 2³⁴ = 687901448813869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687918628683353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343959314341526 + 343959314341527.

It is an arithmetic number, because the mean of its divisors is an integer number (343959314341527).

Almost surely, 2^{687918628683053} is an apocalyptic number.

It is an amenable number.

687918628683053 is a deficient number, since it is larger than the sum of its proper divisors (1).

687918628683053 is an equidigital number, since it uses as much as digits as its factorization.

687918628683053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5016453120, while the sum is 80.

The spelling of 687918628683053 in words is "six hundred eighty-seven trillion, nine hundred eighteen billion, six hundred twenty-eight million, six hundred eighty-three thousand, fifty-three".