1530139689 has 81 divisors (see below), whose sum is σ = 2586179973. Its totient is φ = 871213824.

The previous prime is 1530139687. The next prime is 1530139727. The reversal of 1530139689 is 9869310351.

The square root of 1530139689 is 39117.

It is a perfect power (a square), and thus also a powerful number.

1530139689 is a `hidden beast` number, since 1 + 530 + 1 + 39 + 6 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13816089 + 1516323600 = 3717^2 + 38940^2 .

It is not a de Polignac number, because 1530139689 - 2¹ = 1530139687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1530139687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 25934542 + ... + 25934600.

Almost surely, 2^1530139689 is an apocalyptic number.

1530139689 is the 39117-th square number.

1530139689 is the 19559-th centered octagonal number.

It is an amenable number.

1530139689 is a deficient number, since it is larger than the sum of its proper divisors (1056040284).

1530139689 is a wasteful number, since it uses less digits than its factorization.

1530139689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The cubic root of 1530139689 is about 1152.3304196325.

The spelling of 1530139689 in words is "one billion, five hundred thirty million, one hundred thirty-nine thousand, six hundred eighty-nine".