489378266693 has 2 divisors, whose sum is σ = 489378266694. Its totient is φ = 489378266692.

The previous prime is 489378266683. The next prime is 489378266719. The reversal of 489378266693 is 396662873984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452716356964 + 36661909729 = 672842^2 + 191473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489378266693 is a prime.

It is a super-2 number, since 2×489378266693² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489378266633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244689133346 + 244689133347.

It is an arithmetic number, because the mean of its divisors is an integer number (244689133347).

Almost surely, 2^489378266693 is an apocalyptic number.

It is an amenable number.

489378266693 is a deficient number, since it is larger than the sum of its proper divisors (1).

489378266693 is an equidigital number, since it uses as much as digits as its factorization.

489378266693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564350976, while the sum is 71.

The spelling of 489378266693 in words is "four hundred eighty-nine billion, three hundred seventy-eight million, two hundred sixty-six thousand, six hundred ninety-three".