816317 has 2 divisors, whose sum is σ = 816318. Its totient is φ = 816316.

The previous prime is 816271. The next prime is 816329. The reversal of 816317 is 713618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763876 + 52441 = 874^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 816317 - 2¹² = 812221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408158 + 408159.

It is an arithmetic number, because the mean of its divisors is an integer number (408159).

2⁸¹⁶³¹⁷ is an apocalyptic number.

It is an amenable number.

816317 is a deficient number, since it is larger than the sum of its proper divisors (1).

816317 is an equidigital number, since it uses as much as digits as its factorization.

816317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 816317 is about 903.5026286625. The cubic root of 816317 is about 93.4586737211.

The spelling of 816317 in words is "eight hundred sixteen thousand, three hundred seventeen".