1389125029 has 6 divisors (see below), whose sum is σ = 1475645234. Its totient is φ = 1307411520.

The previous prime is 1389124999. The next prime is 1389125033. The reversal of 1389125029 is 9205219831.

It can be written as a sum of positive squares in 3 ways, for example, as 660233025 + 728892004 = 25695^2 + 26998^2 .

It is not a de Polignac number, because 1389125029 - 2¹¹ = 1389122981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1389124982 and 1389125000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389125329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2403042 + ... + 2403619.

Almost surely, 2^1389125029 is an apocalyptic number.

It is an amenable number.

1389125029 is a deficient number, since it is larger than the sum of its proper divisors (86520205).

1389125029 is an equidigital number, since it uses as much as digits as its factorization.

1389125029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806695 (or 4806678 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1389125029 is about 37270.9676423889. The cubic root of 1389125029 is about 1115.7848118755.

The spelling of 1389125029 in words is "one billion, three hundred eighty-nine million, one hundred twenty-five thousand, twenty-nine".