1389847653 has 20 divisors (see below), whose sum is σ = 2078893740. Its totient is φ = 925359552.

The previous prime is 1389847651. The next prime is 1389847661. The reversal of 1389847653 is 3567489831.

1389847653 is a `hidden beast` number, since 1 + 38 + 98 + 476 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 435223044 + 954624609 = 20862^2 + 30897^2 .

It is not a de Polignac number, because 1389847653 - 2¹ = 1389847651 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1389847653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389847651) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53793 + ... + 75321.

It is an arithmetic number, because the mean of its divisors is an integer number (103944687).

Almost surely, 2^1389847653 is an apocalyptic number.

It is an amenable number.

1389847653 is a deficient number, since it is larger than the sum of its proper divisors (689046087).

1389847653 is an equidigital number, since it uses as much as digits as its factorization.

1389847653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22338 (or 22329 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1389847653 is about 37280.6605762291. The cubic root of 1389847653 is about 1115.9782557331.

The spelling of 1389847653 in words is "one billion, three hundred eighty-nine million, eight hundred forty-seven thousand, six hundred fifty-three".