816069 has 16 divisors (see below), whose sum is σ = 1164800. Its totient is φ = 506736.

The previous prime is 816047. The next prime is 816077. The reversal of 816069 is 960618.

It is not a de Polignac number, because 816069 - 2⁵ = 816037 is a prime.

It is a super-2 number, since 2×816069² = 1331937225522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816019) 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 in 15 ways as a sum of consecutive naturals, for example, 5802 + ... + 5940.

It is an arithmetic number, because the mean of its divisors is an integer number (72800).

2⁸¹⁶⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

816069 is a deficient number, since it is larger than the sum of its proper divisors (348731).

816069 is a wasteful number, since it uses less digits than its factorization.

816069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 816069 is about 903.3653745855. The cubic root of 816069 is about 93.4492084037.

The spelling of 816069 in words is "eight hundred sixteen thousand, sixty-nine".