406843009 has 16 divisors (see below), whose sum is σ = 426400128. Its totient is φ = 387821952.

The previous prime is 406843007. The next prime is 406843027. The reversal of 406843009 is 900348604.

It is a cyclic number.

It is not a de Polignac number, because 406843009 - 2¹ = 406843007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406843007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420244 + ... + 421210.

It is an arithmetic number, because the mean of its divisors is an integer number (26650008).

Almost surely, 2^406843009 is an apocalyptic number.

It is an amenable number.

406843009 is a deficient number, since it is larger than the sum of its proper divisors (19557119).

406843009 is a wasteful number, since it uses less digits than its factorization.

406843009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 406843009 is about 20170.3497490748. The cubic root of 406843009 is about 740.9842084293.

The spelling of 406843009 in words is "four hundred six million, eight hundred forty-three thousand, nine".