406219999 has 2 divisors, whose sum is σ = 406220000. Its totient is φ = 406219998.

The previous prime is 406219987. The next prime is 406220021. The reversal of 406219999 is 999912604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406219999 - 2⁷ = 406219871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406219909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203109999 + 203110000.

It is an arithmetic number, because the mean of its divisors is an integer number (203110000).

Almost surely, 2^406219999 is an apocalyptic number.

406219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

406219999 is an equidigital number, since it uses as much as digits as its factorization.

406219999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 406219999 is about 20154.9001237912. The cubic root of 406219999 is about 740.6057853003.

The spelling of 406219999 in words is "four hundred six million, two hundred nineteen thousand, nine hundred ninety-nine".