420085009 has 8 divisors (see below), whose sum is σ = 422118080. Its totient is φ = 418057200.

The previous prime is 420084989. The next prime is 420085027. The reversal of 420085009 is 900580024.

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 420085009 - 2¹⁹ = 419560721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420085069) 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, 303499 + ... + 304879.

It is an arithmetic number, because the mean of its divisors is an integer number (52764760).

Almost surely, 2^420085009 is an apocalyptic number.

It is an amenable number.

420085009 is a deficient number, since it is larger than the sum of its proper divisors (2033071).

420085009 is a wasteful number, since it uses less digits than its factorization.

420085009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 420085009 is about 20495.9754342163. The cubic root of 420085009 is about 748.9377608335.

The spelling of 420085009 in words is "four hundred twenty million, eighty-five thousand, nine".