420799 has 2 divisors, whose sum is σ = 420800. Its totient is φ = 420798.

The previous prime is 420781. The next prime is 420803. The reversal of 420799 is 997024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420799 - 2⁷ = 420671 is a prime.

420799 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 420799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210399 + 210400.

It is an arithmetic number, because the mean of its divisors is an integer number (210400).

2⁴²⁰⁷⁹⁹ is an apocalyptic number.

420799 is a deficient number, since it is larger than the sum of its proper divisors (1).

420799 is an equidigital number, since it uses as much as digits as its factorization.

420799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 420799 is about 648.6902188256. The cubic root of 420799 is about 74.9361827506.

The spelling of 420799 in words is "four hundred twenty thousand, seven hundred ninety-nine".