1389211589 has 4 divisors (see below), whose sum is σ = 1390070220. Its totient is φ = 1388352960.

The previous prime is 1389211541. The next prime is 1389211597. The reversal of 1389211589 is 9851129831.

It is a happy number.

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 1214522500 + 174689089 = 34850^2 + 13217^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389211589 - 2²⁰ = 1388163013 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 (1389213589) 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, 426884 + ... + 430125.

It is an arithmetic number, because the mean of its divisors is an integer number (347517555).

Almost surely, 2^1389211589 is an apocalyptic number.

It is an amenable number.

1389211589 is a deficient number, since it is larger than the sum of its proper divisors (858631).

1389211589 is an equidigital number, since it uses as much as digits as its factorization.

1389211589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858630.

The product of its digits is 155520, while the sum is 47.

The square root of 1389211589 is about 37272.1288498524. The cubic root of 1389211589 is about 1115.8079872138.

The spelling of 1389211589 in words is "one billion, three hundred eighty-nine million, two hundred eleven thousand, five hundred eighty-nine".