423129609 has 64 divisors (see below), whose sum is σ = 768614400. Its totient is φ = 224550144.

The previous prime is 423129599. The next prime is 423129613. The reversal of 423129609 is 906921324.

423129609 is a `hidden beast` number, since 4 + 23 + 1 + 29 + 609 = 666.

It is not a de Polignac number, because 423129609 - 2⁴ = 423129593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423129649) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 252994 + ... + 254660.

It is an arithmetic number, because the mean of its divisors is an integer number (12009600).

Almost surely, 2^423129609 is an apocalyptic number.

It is an amenable number.

423129609 is a deficient number, since it is larger than the sum of its proper divisors (345484791).

423129609 is a wasteful number, since it uses less digits than its factorization.

423129609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 423129609 is about 20570.1144624915. The cubic root of 423129609 is about 750.7427362144.

The spelling of 423129609 in words is "four hundred twenty-three million, one hundred twenty-nine thousand, six hundred nine".