1230538509 has 12 divisors (see below), whose sum is σ = 1782818752. Its totient is φ = 817878600.

The previous prime is 1230538493. The next prime is 1230538579. The reversal of 1230538509 is 9058350321.

It is not a de Polignac number, because 1230538509 - 2⁴ = 1230538493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230538579) 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 11 ways as a sum of consecutive naturals, for example, 203557 + ... + 209514.

Almost surely, 2^1230538509 is an apocalyptic number.

It is an amenable number.

1230538509 is a deficient number, since it is larger than the sum of its proper divisors (552280243).

1230538509 is a wasteful number, since it uses less digits than its factorization.

1230538509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413408 (or 413405 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1230538509 is about 35079.0323270184. The cubic root of 1230538509 is about 1071.5976102285.

The spelling of 1230538509 in words is "one billion, two hundred thirty million, five hundred thirty-eight thousand, five hundred nine".