1378323217289 has 2 divisors, whose sum is σ = 1378323217290. Its totient is φ = 1378323217288.

The previous prime is 1378323217241. The next prime is 1378323217301. The reversal of 1378323217289 is 9827123238731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1287469200889 + 90854016400 = 1134667^2 + 301420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378323217289 - 2³⁶ = 1309603740553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378323217589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689161608644 + 689161608645.

It is an arithmetic number, because the mean of its divisors is an integer number (689161608645).

Almost surely, 2^{1378323217289} is an apocalyptic number.

It is an amenable number.

1378323217289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378323217289 is an equidigital number, since it uses as much as digits as its factorization.

1378323217289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The spelling of 1378323217289 in words is "one trillion, three hundred seventy-eight billion, three hundred twenty-three million, two hundred seventeen thousand, two hundred eighty-nine".