1392794147889 has 27 divisors (see below), whose sum is σ = 2045652192129. Its totient is φ = 913166017920.

The previous prime is 1392794147887. The next prime is 1392794147917. The reversal of 1392794147889 is 9887414972931.

The square root of 1392794147889 is 1180167.

It is a perfect power (a square), and thus also a powerful number.

1392794147889 is a `hidden beast` number, since 1 + 3 + 9 + 2 + 79 + 4 + 1 + 478 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 63728289 + 1392730419600 = 7983^2 + 1180140^2 .

It is not a de Polignac number, because 1392794147889 - 2¹ = 1392794147887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1392794147887) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 215967337 + ... + 215973785.

Almost surely, 2^{1392794147889} is an apocalyptic number.

1392794147889 is the 1180167-th square number.

1392794147889 is the 590084-th centered octagonal number.

It is an amenable number.

1392794147889 is a deficient number, since it is larger than the sum of its proper divisors (652858044240).

1392794147889 is an frugal number, since it uses more digits than its factorization.

1392794147889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13026 (or 6513 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The spelling of 1392794147889 in words is "one trillion, three hundred ninety-two billion, seven hundred ninety-four million, one hundred forty-seven thousand, eight hundred eighty-nine".