1389873587041 has 9 divisors (see below), whose sum is σ = 1402416622009. Its totient is φ = 1377441780736.

The previous prime is 1389873587027. The next prime is 1389873587159. The reversal of 1389873587041 is 1407853789831.

The square root of 1389873587041 is 1178929.

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

It can be written as a sum of positive squares in 4 ways, for example, as 324354169441 + 1065519417600 = 569521^2 + 1032240^2 .

It is not a de Polignac number, because 1389873587041 - 2³³ = 1381283652449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389873587741) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 133213761 + ... + 133224193.

Almost surely, 2^{1389873587041} is an apocalyptic number.

1389873587041 is the 1178929-th square number.

1389873587041 is the 589465-th centered octagonal number.

It is an amenable number.

1389873587041 is a deficient number, since it is larger than the sum of its proper divisors (12543034968).

1389873587041 is an frugal number, since it uses more digits than its factorization.

1389873587041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21092 (or 10546 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 64.

Multiplying 1389873587041 by its sum of digits (64), we get a square (88951909570624 = 9431432²).

The spelling of 1389873587041 in words is "one trillion, three hundred eighty-nine billion, eight hundred seventy-three million, five hundred eighty-seven thousand, forty-one".