1663223987213 has 2 divisors, whose sum is σ = 1663223987214. Its totient is φ = 1663223987212.

The previous prime is 1663223987197. The next prime is 1663223987263. The reversal of 1663223987213 is 3127893223661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940865080324 + 722358906889 = 969982^2 + 849917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663223987213 - 2⁴ = 1663223987197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663223987263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831611993606 + 831611993607.

It is an arithmetic number, because the mean of its divisors is an integer number (831611993607).

Almost surely, 2^{1663223987213} is an apocalyptic number.

It is an amenable number.

1663223987213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663223987213 is an equidigital number, since it uses as much as digits as its factorization.

1663223987213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 53.

The spelling of 1663223987213 in words is "one trillion, six hundred sixty-three billion, two hundred twenty-three million, nine hundred eighty-seven thousand, two hundred thirteen".