816938 has 4 divisors (see below), whose sum is σ = 1225410. Its totient is φ = 408468.

The previous prime is 816929. The next prime is 816941. The reversal of 816938 is 839618.

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., 779689 + 37249 = 883^2 + 193^2 .

It is a junction number, because it is equal to n+sod(n) for n = 816898 and 816907.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 204233 + ... + 204236.

2⁸¹⁶⁹³⁸ is an apocalyptic number.

816938 is a deficient number, since it is larger than the sum of its proper divisors (408472).

816938 is a wasteful number, since it uses less digits than its factorization.

816938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408471.

The product of its digits is 10368, while the sum is 35.

The square root of 816938 is about 903.8462258592. The cubic root of 816938 is about 93.4823667740.

The spelling of 816938 in words is "eight hundred sixteen thousand, nine hundred thirty-eight".