1589638889 has 4 divisors (see below), whose sum is σ = 1601075280. Its totient is φ = 1578202500.

The previous prime is 1589638849. The next prime is 1589638993. The reversal of 1589638889 is 9888369851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9888369851 = 59 ⋅167599489.

It is a cyclic number.

It is not a de Polignac number, because 1589638889 - 2²⁴ = 1572861673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1589638849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5717987 + ... + 5718264.

It is an arithmetic number, because the mean of its divisors is an integer number (400268820).

Almost surely, 2^1589638889 is an apocalyptic number.

It is an amenable number.

1589638889 is a deficient number, since it is larger than the sum of its proper divisors (11436391).

1589638889 is a wasteful number, since it uses less digits than its factorization.

1589638889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436390.

The product of its digits is 29859840, while the sum is 65.

The square root of 1589638889 is about 39870.2757577622. The cubic root of 1589638889 is about 1167.0769532288.

The spelling of 1589638889 in words is "one billion, five hundred eighty-nine million, six hundred thirty-eight thousand, eight hundred eighty-nine".