123089 has 4 divisors (see below), whose sum is σ = 124656. Its totient is φ = 121524.

The previous prime is 123083. The next prime is 123091. The reversal of 123089 is 980321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123089 - 2⁸ = 122833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659 + ... + 824.

It is an arithmetic number, because the mean of its divisors is an integer number (31164).

2¹²³⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

123089 is a deficient number, since it is larger than the sum of its proper divisors (1567).

123089 is an equidigital number, since it uses as much as digits as its factorization.

123089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 123089 is about 350.8404195642. The cubic root of 123089 is about 49.7438903973.

The spelling of 123089 in words is "one hundred twenty-three thousand, eighty-nine".