423784009 has 4 divisors (see below), whose sum is σ = 462309840. Its totient is φ = 385258180.

The previous prime is 423784003. The next prime is 423784021. The reversal of 423784009 is 900487324.

It is a happy number.

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 423784009 - 2³ = 423784001 is a prime.

It is a super-2 number, since 2×423784009² = 359185772568224162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423784001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19262899 + ... + 19262920.

It is an arithmetic number, because the mean of its divisors is an integer number (115577460).

Almost surely, 2^423784009 is an apocalyptic number.

It is an amenable number.

423784009 is a deficient number, since it is larger than the sum of its proper divisors (38525831).

423784009 is a wasteful number, since it uses less digits than its factorization.

423784009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38525830.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 423784009 is about 20586.0148887540. The cubic root of 423784009 is about 751.1295625232.

The spelling of 423784009 in words is "four hundred twenty-three million, seven hundred eighty-four thousand, nine".