814505999 has 2 divisors, whose sum is σ = 814506000. Its totient is φ = 814505998.

The previous prime is 814505983. The next prime is 814506029. The reversal of 814505999 is 999505418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 814505999 - 2⁴ = 814505983 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814505599) 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, 407252999 + 407253000.

It is an arithmetic number, because the mean of its divisors is an integer number (407253000).

Almost surely, 2^814505999 is an apocalyptic number.

814505999 is a deficient number, since it is larger than the sum of its proper divisors (1).

814505999 is an equidigital number, since it uses as much as digits as its factorization.

814505999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 814505999 is about 28539.5514856138. The cubic root of 814505999 is about 933.8950979366.

The spelling of 814505999 in words is "eight hundred fourteen million, five hundred five thousand, nine hundred ninety-nine".