816682 has 4 divisors (see below), whose sum is σ = 1225026. Its totient is φ = 408340.

The previous prime is 816667. The next prime is 816689. The reversal of 816682 is 286618.

816682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 22801 = 891^2 + 151^2 .

It is not an unprimeable number, because it can be changed into a prime (816689) by changing a digit.

816682 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204169 + ... + 204172.

2⁸¹⁶⁶⁸² is an apocalyptic number.

816682 is a deficient number, since it is larger than the sum of its proper divisors (408344).

816682 is a wasteful number, since it uses less digits than its factorization.

816682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408343.

The product of its digits is 4608, while the sum is 31.

The square root of 816682 is about 903.7045977530. The cubic root of 816682 is about 93.4726010447.

The spelling of 816682 in words is "eight hundred sixteen thousand, six hundred eighty-two".