1389831325 has 12 divisors (see below), whose sum is σ = 1765426068. Its totient is φ = 1084745600.

The previous prime is 1389831307. The next prime is 1389831329. The reversal of 1389831325 is 5231389831.

It can be written as a sum of positive squares in 6 ways, for example, as 9114361 + 1380716964 = 3019^2 + 37158^2 .

It is not a de Polignac number, because 1389831325 - 2¹³ = 1389823133 is a prime.

It is a super-2 number, since 2×1389831325² = 3863262223902511250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389831329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676942 + ... + 678991.

It is an arithmetic number, because the mean of its divisors is an integer number (147118839).

Almost surely, 2^1389831325 is an apocalyptic number.

It is an amenable number.

1389831325 is a deficient number, since it is larger than the sum of its proper divisors (375594743).

1389831325 is a wasteful number, since it uses less digits than its factorization.

1389831325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355984 (or 1355979 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 1389831325 is about 37280.4415880499. The cubic root of 1389831325 is about 1115.9738855265.

The spelling of 1389831325 in words is "one billion, three hundred eighty-nine million, eight hundred thirty-one thousand, three hundred twenty-five".