816469 has 2 divisors, whose sum is σ = 816470.
Its totient is φ = 816468.
The previous prime is 816451. The next prime is 816499. The reversal of 816469 is 964618.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 438244 + 378225 = 662^2 + 615^2
It is a cyclic number.
It is not a de Polignac number, because 816469 - 27 = 816341 is a prime.
It is a super-2 number, since 2×8164692 = 1333243255922, which contains 22 as substring.
It is a nialpdrome in base 16.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (816499) 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, 408234 + 408235.
It is an arithmetic number, because the mean of its divisors is an integer number (408235).
2816469 is an apocalyptic number.
It is an amenable number.
816469 is a deficient number, since it is larger than the sum of its proper divisors (1).
816469 is an equidigital number, since it uses as much as digits as its factorization.
816469 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 10368, while the sum is 34.
The square root of 816469 is about 903.5867418239.
The cubic root of 816469 is about 93.4644740972.
The spelling of 816469 in words is "eight hundred sixteen thousand, four hundred sixty-nine".