1389888976841 has 2 divisors, whose sum is σ = 1389888976842. Its totient is φ = 1389888976840.

The previous prime is 1389888976811. The next prime is 1389888976919. The reversal of 1389888976841 is 1486798889831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1370070250000 + 19818726841 = 1170500^2 + 140779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389888976841 - 2¹⁰ = 1389888975817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1389888976811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694944488420 + 694944488421.

It is an arithmetic number, because the mean of its divisors is an integer number (694944488421).

Almost surely, 2^{1389888976841} is an apocalyptic number.

It is an amenable number.

1389888976841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389888976841 is an equidigital number, since it uses as much as digits as its factorization.

1389888976841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1337720832, while the sum is 80.

The spelling of 1389888976841 in words is "one trillion, three hundred eighty-nine billion, eight hundred eighty-eight million, nine hundred seventy-six thousand, eight hundred forty-one".