4206405109 has 2 divisors, whose sum is σ = 4206405110. Its totient is φ = 4206405108.

The previous prime is 4206405101. The next prime is 4206405139. The reversal of 4206405109 is 9015046024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4056416100 + 149989009 = 63690^2 + 12247^2 .

It is a cyclic number.

It is not a de Polignac number, because 4206405109 - 2³ = 4206405101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4206405101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2103202554 + 2103202555.

It is an arithmetic number, because the mean of its divisors is an integer number (2103202555).

Almost surely, 2^4206405109 is an apocalyptic number.

It is an amenable number.

4206405109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4206405109 is an equidigital number, since it uses as much as digits as its factorization.

4206405109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 4206405109 is about 64856.8046468526. The cubic root of 4206405109 is about 1614.2484029680.

The spelling of 4206405109 in words is "four billion, two hundred six million, four hundred five thousand, one hundred nine".