406011009 has 4 divisors (see below), whose sum is σ = 541348016. Its totient is φ = 270674004.

The previous prime is 406011007. The next prime is 406011029. The reversal of 406011009 is 900110604.

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 not a de Polignac number, because 406011009 - 2¹ = 406011007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406011007) 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, 67668499 + ... + 67668504.

It is an arithmetic number, because the mean of its divisors is an integer number (135337004).

Almost surely, 2^406011009 is an apocalyptic number.

It is an amenable number.

406011009 is a deficient number, since it is larger than the sum of its proper divisors (135337007).

406011009 is a wasteful number, since it uses less digits than its factorization.

406011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135337006.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 406011009 is about 20149.7148615061. The cubic root of 406011009 is about 740.4787558135.

The spelling of 406011009 in words is "four hundred six million, eleven thousand, nine".