816959 has 16 divisors (see below), whose sum is σ = 997920. Its totient is φ = 658560.

The previous prime is 816947. The next prime is 816961. The reversal of 816959 is 959618.

It is a cyclic number.

It is not a de Polignac number, because 816959 - 2⁸ = 816703 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 816959.

It is not an unprimeable number, because it can be changed into a prime (816919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4049 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2⁸¹⁶⁹⁵⁹ is an apocalyptic number.

816959 is a deficient number, since it is larger than the sum of its proper divisors (180961).

816959 is a wasteful number, since it uses less digits than its factorization.

816959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its digits is 19440, while the sum is 38.

The square root of 816959 is about 903.8578428049. The cubic root of 816959 is about 93.4831677784.

It can be divided in two parts, 8169 and 59, that added together give a palindrome (8228).

The spelling of 816959 in words is "eight hundred sixteen thousand, nine hundred fifty-nine".