1688494122793 has 2 divisors, whose sum is σ = 1688494122794. Its totient is φ = 1688494122792.

The previous prime is 1688494122761. The next prime is 1688494122797. The reversal of 1688494122793 is 3972214948861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1458413691904 + 230080430889 = 1207648^2 + 479667^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688494122793 - 2⁵ = 1688494122761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1688494122797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844247061396 + 844247061397.

It is an arithmetic number, because the mean of its divisors is an integer number (844247061397).

Almost surely, 2^{1688494122793} is an apocalyptic number.

It is an amenable number.

1688494122793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688494122793 is an equidigital number, since it uses as much as digits as its factorization.

1688494122793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 64.

The spelling of 1688494122793 in words is "one trillion, six hundred eighty-eight billion, four hundred ninety-four million, one hundred twenty-two thousand, seven hundred ninety-three".