817982 has 8 divisors (see below), whose sum is σ = 1338552. Its totient is φ = 371800.

The previous prime is 817979. The next prime is 817987. The reversal of 817982 is 289718.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18569 + ... + 18612.

It is an arithmetic number, because the mean of its divisors is an integer number (167319).

2⁸¹⁷⁹⁸² is an apocalyptic number.

817982 is a deficient number, since it is larger than the sum of its proper divisors (520570).

817982 is a wasteful number, since it uses less digits than its factorization.

817982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37194.

The product of its digits is 8064, while the sum is 35.

The square root of 817982 is about 904.4235733328. The cubic root of 817982 is about 93.5221715272.

The spelling of 817982 in words is "eight hundred seventeen thousand, nine hundred eighty-two".