816697 has 8 divisors (see below), whose sum is σ = 988416. Its totient is φ = 658752.

The previous prime is 816691. The next prime is 816703. The reversal of 816697 is 796618.

It is an interprime number because it is at equal distance from previous prime (816691) and next prime (816703).

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

It is a cyclic number.

It is not a de Polignac number, because 816697 - 2³ = 816689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816691) 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, 3313 + ... + 3550.

It is an arithmetic number, because the mean of its divisors is an integer number (123552).

2⁸¹⁶⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

816697 is a deficient number, since it is larger than the sum of its proper divisors (171719).

816697 is a wasteful number, since it uses less digits than its factorization.

816697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887.

The product of its digits is 18144, while the sum is 37.

The square root of 816697 is about 903.7128968871. The cubic root of 816697 is about 93.4731733117.

The spelling of 816697 in words is "eight hundred sixteen thousand, six hundred ninety-seven".