1123641589 has 20 divisors (see below), whose sum is σ = 1379884640. Its totient is φ = 912393720.

The previous prime is 1123641587. The next prime is 1123641619. The reversal of 1123641589 is 9851463211.

It is not a de Polignac number, because 1123641589 - 2¹ = 1123641587 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 (1123641581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33304 + ... + 57934.

It is an arithmetic number, because the mean of its divisors is an integer number (68994232).

Almost surely, 2^1123641589 is an apocalyptic number.

1123641589 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1123641589 is a deficient number, since it is larger than the sum of its proper divisors (256243051).

1123641589 is an frugal number, since it uses more digits than its factorization.

1123641589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24678 (or 24657 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 1123641589 is about 33520.7635503728. The cubic root of 1123641589 is about 1039.6231342230.

It can be divided in two parts, 11236 and 41589, that added together give a palindrome (52825).

The spelling of 1123641589 in words is "one billion, one hundred twenty-three million, six hundred forty-one thousand, five hundred eighty-nine".