409995009 has 12 divisors (see below), whose sum is σ = 592398352. Its totient is φ = 273245400.

The previous prime is 409995007. The next prime is 409995013. The reversal of 409995009 is 900599904.

It is a happy number.

It is not a de Polignac number, because 409995009 - 2¹ = 409995007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409995007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40554 + ... + 49644.

Almost surely, 2^409995009 is an apocalyptic number.

It is an amenable number.

409995009 is a deficient number, since it is larger than the sum of its proper divisors (182403343).

409995009 is a wasteful number, since it uses less digits than its factorization.

409995009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14108 (or 14105 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 409995009 is about 20248.3334869811. Note that the first 3 decimals coincide. The cubic root of 409995009 is about 742.8928696663.

The spelling of 409995009 in words is "four hundred nine million, nine hundred ninety-five thousand, nine".