406005109 has 8 divisors (see below), whose sum is σ = 419668992. Its totient is φ = 392376720.

The previous prime is 406005079. The next prime is 406005113. The reversal of 406005109 is 901500604.

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 406005109 - 2⁵ = 406005077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406005139) 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, 15492 + ... + 32434.

It is an arithmetic number, because the mean of its divisors is an integer number (52458624).

Almost surely, 2^406005109 is an apocalyptic number.

It is an amenable number.

406005109 is a deficient number, since it is larger than the sum of its proper divisors (13663883).

406005109 is a wasteful number, since it uses less digits than its factorization.

406005109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17747.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 406005109 is about 20149.5684569174. The cubic root of 406005109 is about 740.4751690094.

The spelling of 406005109 in words is "four hundred six million, five thousand, one hundred nine".