1239495489 has 12 divisors (see below), whose sum is σ = 1804481536. Its totient is φ = 819823032.

The previous prime is 1239495473. The next prime is 1239495497. The reversal of 1239495489 is 9845949321.

1239495489 is a `hidden beast` number, since 1 + 2 + 3 + 94 + 9 + 548 + 9 = 666.

It is not a de Polignac number, because 1239495489 - 2⁴ = 1239495473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239495589) 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, 541069 + ... + 543354.

Almost surely, 2^1239495489 is an apocalyptic number.

It is an amenable number.

1239495489 is a deficient number, since it is larger than the sum of its proper divisors (564986047).

1239495489 is a wasteful number, since it uses less digits than its factorization.

1239495489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084556 (or 1084553 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 1239495489 is about 35206.4694196961. The cubic root of 1239495489 is about 1074.1913483020.

The spelling of 1239495489 in words is "one billion, two hundred thirty-nine million, four hundred ninety-five thousand, four hundred eighty-nine".