418445009 has 4 divisors (see below), whose sum is σ = 421216320. Its totient is φ = 415673700.

The previous prime is 418444967. The next prime is 418445023. The reversal of 418445009 is 900544814.

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 a de Polignac number, because none of the positive numbers 2^k-418445009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 418445009.

It is not an unprimeable number, because it can be changed into a prime (418445039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1385429 + ... + 1385730.

It is an arithmetic number, because the mean of its divisors is an integer number (105304080).

Almost surely, 2^418445009 is an apocalyptic number.

It is an amenable number.

418445009 is a deficient number, since it is larger than the sum of its proper divisors (2771311).

418445009 is a wasteful number, since it uses less digits than its factorization.

418445009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771310.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 418445009 is about 20455.9284560736. The cubic root of 418445009 is about 747.9618791758.

The spelling of 418445009 in words is "four hundred eighteen million, four hundred forty-five thousand, nine".