1389002526389 has 4 divisors (see below), whose sum is σ = 1436899165260. Its totient is φ = 1341105887520.

The previous prime is 1389002526383. The next prime is 1389002526427. The reversal of 1389002526389 is 9836252009831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 735920348164 + 653082178225 = 857858^2 + 808135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389002526389 - 2¹² = 1389002522293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389002526383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23948319392 + ... + 23948319449.

It is an arithmetic number, because the mean of its divisors is an integer number (359224791315).

Almost surely, 2^{1389002526389} is an apocalyptic number.

It is an amenable number.

1389002526389 is a deficient number, since it is larger than the sum of its proper divisors (47896638871).

1389002526389 is an equidigital number, since it uses as much as digits as its factorization.

1389002526389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47896638870.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 1389002526389 in words is "one trillion, three hundred eighty-nine billion, two million, five hundred twenty-six thousand, three hundred eighty-nine".