1387379206789 has 2 divisors, whose sum is σ = 1387379206790. Its totient is φ = 1387379206788.

The previous prime is 1387379206747. The next prime is 1387379206859. The reversal of 1387379206789 is 9876029737831.

It is a happy number.

It is an a-pointer prime, because the next prime (1387379206859) can be obtained adding 1387379206789 to its sum of digits (70).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380077504289 + 7301702500 = 1174767^2 + 85450^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387379206789 - 2²¹ = 1387377109637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387379206739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693689603394 + 693689603395.

It is an arithmetic number, because the mean of its divisors is an integer number (693689603395).

Almost surely, 2^{1387379206789} is an apocalyptic number.

It is an amenable number.

1387379206789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387379206789 is an equidigital number, since it uses as much as digits as its factorization.

1387379206789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192036096, while the sum is 70.

The spelling of 1387379206789 in words is "one trillion, three hundred eighty-seven billion, three hundred seventy-nine million, two hundred six thousand, seven hundred eighty-nine".