816982 has 4 divisors (see below), whose sum is σ = 1225476. Its totient is φ = 408490.

The previous prime is 816971. The next prime is 817013. The reversal of 816982 is 289618.

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

It is a congruent number.

It is an unprimeable number.

816982 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, 204244 + ... + 204247.

It is an arithmetic number, because the mean of its divisors is an integer number (306369).

2⁸¹⁶⁹⁸² is an apocalyptic number.

816982 is a deficient number, since it is larger than the sum of its proper divisors (408494).

816982 is a wasteful number, since it uses less digits than its factorization.

816982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408493.

The product of its digits is 6912, while the sum is 34.

The square root of 816982 is about 903.8705659551. The cubic root of 816982 is about 93.4840450532.

The spelling of 816982 in words is "eight hundred sixteen thousand, nine hundred eighty-two".