123589989 has 16 divisors (see below), whose sum is σ = 184161600. Its totient is φ = 81913968.

The previous prime is 123589981. The next prime is 123590069. The reversal of 123589989 is 989985321.

It is not a de Polignac number, because 123589989 - 2³ = 123589981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123589981) 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 15 ways as a sum of consecutive naturals, for example, 8559 + ... + 17900.

It is an arithmetic number, because the mean of its divisors is an integer number (11510100).

Almost surely, 2^123589989 is an apocalyptic number.

It is an amenable number.

123589989 is a deficient number, since it is larger than the sum of its proper divisors (60571611).

123589989 is a wasteful number, since it uses less digits than its factorization.

123589989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26641 (or 26635 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 123589989 is about 11117.1034446928. The cubic root of 123589989 is about 498.1128717883.

The spelling of 123589989 in words is "one hundred twenty-three million, five hundred eighty-nine thousand, nine hundred eighty-nine".