800399 has 2 divisors, whose sum is σ = 800400. Its totient is φ = 800398.

The previous prime is 800357. The next prime is 800407. The reversal of 800399 is 993008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800399 - 2⁸ = 800143 is a 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 (800329) 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, 400199 + 400200.

It is an arithmetic number, because the mean of its divisors is an integer number (400200).

2⁸⁰⁰³⁹⁹ is an apocalyptic number.

800399 is a deficient number, since it is larger than the sum of its proper divisors (1).

800399 is an equidigital number, since it uses as much as digits as its factorization.

800399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 800399 is about 894.6502109763. The cubic root of 800399 is about 92.8472073901.

It can be divided in two parts, 8003 and 99, that multiplied together give a palindrome (792297).

The spelling of 800399 in words is "eight hundred thousand, three hundred ninety-nine".