816683 has 8 divisors (see below), whose sum is σ = 952800. Its totient is φ = 699720.

The previous prime is 816667. The next prime is 816689. The reversal of 816683 is 386618.

It is not a de Polignac number, because 816683 - 2⁴ = 816667 is a prime.

It is a super-2 number, since 2×816683² = 1333942244978, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (816689) 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 7 ways as a sum of consecutive naturals, for example, 848 + ... + 1533.

It is an arithmetic number, because the mean of its divisors is an integer number (119100).

2⁸¹⁶⁶⁸³ is an apocalyptic number.

816683 is a deficient number, since it is larger than the sum of its proper divisors (136117).

816683 is an equidigital number, since it uses as much as digits as its factorization.

816683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402 (or 2388 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 816683 is about 903.7051510310. The cubic root of 816683 is about 93.4726391960.

The spelling of 816683 in words is "eight hundred sixteen thousand, six hundred eighty-three".