1389558385 has 4 divisors (see below), whose sum is σ = 1667470068. Its totient is φ = 1111646704.

The previous prime is 1389558371. The next prime is 1389558451. The reversal of 1389558385 is 5838559831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5838559831 = 13 ⋅449119987.

It can be written as a sum of positive squares in 2 ways, for example, as 452157696 + 937400689 = 21264^2 + 30617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389558385 - 2¹⁷ = 1389427313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138955834 + ... + 138955843.

It is an arithmetic number, because the mean of its divisors is an integer number (416867517).

Almost surely, 2^1389558385 is an apocalyptic number.

It is an amenable number.

1389558385 is a deficient number, since it is larger than the sum of its proper divisors (277911683).

1389558385 is an equidigital number, since it uses as much as digits as its factorization.

1389558385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277911682.

The product of its digits is 5184000, while the sum is 55.

The square root of 1389558385 is about 37276.7807757054. The cubic root of 1389558385 is about 1115.9008277753.

The spelling of 1389558385 in words is "one billion, three hundred eighty-nine million, five hundred fifty-eight thousand, three hundred eighty-five".