1390485750889 has 2 divisors, whose sum is σ = 1390485750890. Its totient is φ = 1390485750888.

The previous prime is 1390485750851. The next prime is 1390485750911. The reversal of 1390485750889 is 9880575840931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1026746491225 + 363739259664 = 1013285^2 + 603108^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390485750889 - 2⁹ = 1390485750377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390485750389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695242875444 + 695242875445.

It is an arithmetic number, because the mean of its divisors is an integer number (695242875445).

Almost surely, 2^{1390485750889} is an apocalyptic number.

It is an amenable number.

1390485750889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390485750889 is an equidigital number, since it uses as much as digits as its factorization.

1390485750889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87091200, while the sum is 67.

The spelling of 1390485750889 in words is "one trillion, three hundred ninety billion, four hundred eighty-five million, seven hundred fifty thousand, eight hundred eighty-nine".