123489609 has 8 divisors (see below), whose sum is σ = 169103040. Its totient is φ = 80101296.

The previous prime is 123489577. The next prime is 123489623. The reversal of 123489609 is 906984321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123489609 - 2⁵ = 123489577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123489659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556149 + ... + 556370.

It is an arithmetic number, because the mean of its divisors is an integer number (21137880).

Almost surely, 2^123489609 is an apocalyptic number.

It is an amenable number.

123489609 is a deficient number, since it is larger than the sum of its proper divisors (45613431).

123489609 is a wasteful number, since it uses less digits than its factorization.

123489609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112559.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 123489609 is about 11112.5878624198. The cubic root of 123489609 is about 497.9779792202.

The spelling of 123489609 in words is "one hundred twenty-three million, four hundred eighty-nine thousand, six hundred nine".