818399 has 2 divisors, whose sum is σ = 818400. Its totient is φ = 818398.

The previous prime is 818393. The next prime is 818413. The reversal of 818399 is 993818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818399 - 2⁴ = 818383 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 (818393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409199 + 409200.

It is an arithmetic number, because the mean of its divisors is an integer number (409200).

2⁸¹⁸³⁹⁹ is an apocalyptic number.

818399 is a deficient number, since it is larger than the sum of its proper divisors (1).

818399 is an equidigital number, since it uses as much as digits as its factorization.

818399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 818399 is about 904.6540775346. The cubic root of 818399 is about 93.5380610865.

The spelling of 818399 in words is "eight hundred eighteen thousand, three hundred ninety-nine".