419999 has 2 divisors, whose sum is σ = 420000. Its totient is φ = 419998.

The previous prime is 419959. The next prime is 420001. The reversal of 419999 is 999914.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 419999 - 2⁸ = 419743 is a prime.

It is a Sophie Germain prime.

Together with 420001, it forms a pair of twin primes.

It is a Chen prime.

419999 is a modest number, since divided by 999 gives 419 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (419929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209999 + 210000.

It is an arithmetic number, because the mean of its divisors is an integer number (210000).

2⁴¹⁹⁹⁹⁹ is an apocalyptic number.

419999 is a deficient number, since it is larger than the sum of its proper divisors (1).

419999 is an equidigital number, since it uses as much as digits as its factorization.

419999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 41.

The square root of 419999 is about 648.0732983236. The cubic root of 419999 is about 74.8886644366. Note that the first 3 decimals are identical.

The spelling of 419999 in words is "four hundred nineteen thousand, nine hundred ninety-nine".