123445609 has 8 divisors (see below), whose sum is σ = 141176448. Its totient is φ = 105738720.

The previous prime is 123445601. The next prime is 123445613. The reversal of 123445609 is 906544321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123445609 - 2³ = 123445601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123445601) 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, 6924 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (17647056).

Almost surely, 2^123445609 is an apocalyptic number.

It is an amenable number.

123445609 is a deficient number, since it is larger than the sum of its proper divisors (17730839).

123445609 is a wasteful number, since it uses less digits than its factorization.

123445609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11975.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 123445609 is about 11110.6079491628. The cubic root of 123445609 is about 497.9188281328.

The spelling of 123445609 in words is "one hundred twenty-three million, four hundred forty-five thousand, six hundred nine".