123609609 has 12 divisors (see below), whose sum is σ = 178978800. Its totient is φ = 82207224.

The previous prime is 123609599. The next prime is 123609631. The reversal of 123609609 is 906906321.

123609609 is a `hidden beast` number, since 12 + 36 + 0 + 9 + 609 = 666.

It is not a de Polignac number, because 123609609 - 2⁴ = 123609593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123604609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12619 + ... + 20160.

It is an arithmetic number, because the mean of its divisors is an integer number (14914900).

Almost surely, 2^123609609 is an apocalyptic number.

It is an amenable number.

123609609 is a deficient number, since it is larger than the sum of its proper divisors (55369191).

123609609 is a wasteful number, since it uses less digits than its factorization.

123609609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33204 (or 33201 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 123609609 is about 11117.9858337740. The cubic root of 123609609 is about 498.1392289863.

The spelling of 123609609 in words is "one hundred twenty-three million, six hundred nine thousand, six hundred nine".