404399 has 2 divisors, whose sum is σ = 404400.
Its totient is φ = 404398.
The previous prime is 404389. The next prime is 404419. The reversal of 404399 is 993404.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-404399 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 (404309) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202199 + 202200.
It is an arithmetic number, because the mean of its divisors is an integer number (202200).
2404399 is an apocalyptic number.
404399 is a deficient number, since it is larger than the sum of its proper divisors (1).
404399 is an equidigital number, since it uses as much as digits as its factorization.
404399 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 3888, while the sum is 29.
The square root of 404399 is about 635.9237375661.
The cubic root of 404399 is about 73.9497467428.
The spelling of 404399 in words is "four hundred four thousand, three hundred ninety-nine".