1389104641 has 4 divisors (see below), whose sum is σ = 1422985284. Its totient is φ = 1355224000.

The previous prime is 1389104623. The next prime is 1389104657. The reversal of 1389104641 is 1464019831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1464019831 = 743 ⋅1970417.

It can be written as a sum of positive squares in 2 ways, for example, as 260144641 + 1128960000 = 16129^2 + 33600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389104641 - 2¹⁹ = 1388580353 is a prime.

It is a super-2 number, since 2×1389104641² = 3859223407295477762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389104641.

It is not an unprimeable number, because it can be changed into a prime (1389104671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16940260 + ... + 16940341.

It is an arithmetic number, because the mean of its divisors is an integer number (355746321).

Almost surely, 2^1389104641 is an apocalyptic number.

It is an amenable number.

1389104641 is a deficient number, since it is larger than the sum of its proper divisors (33880643).

1389104641 is an equidigital number, since it uses as much as digits as its factorization.

1389104641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33880642.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1389104641 is about 37270.6941309120. The cubic root of 1389104641 is about 1115.7793531079.

It can be divided in two parts, 1389 and 104641, that added together give a triangular number (106030 = T₄₆₀).

The spelling of 1389104641 in words is "one billion, three hundred eighty-nine million, one hundred four thousand, six hundred forty-one".