123489465493 has 2 divisors, whose sum is σ = 123489465494. Its totient is φ = 123489465492.

The previous prime is 123489465457. The next prime is 123489465521. The reversal of 123489465493 is 394564984321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89315506449 + 34173959044 = 298857^2 + 184862^2 .

It is an emirp because it is prime and its reverse (394564984321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123489465493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123489465413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61744732746 + 61744732747.

It is an arithmetic number, because the mean of its divisors is an integer number (61744732747).

Almost surely, 2^123489465493 is an apocalyptic number.

It is an amenable number.

123489465493 is a deficient number, since it is larger than the sum of its proper divisors (1).

123489465493 is an equidigital number, since it uses as much as digits as its factorization.

123489465493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 58.

The spelling of 123489465493 in words is "one hundred twenty-three billion, four hundred eighty-nine million, four hundred sixty-five thousand, four hundred ninety-three".