861317 has 2 divisors, whose sum is σ = 861318. Its totient is φ = 861316.

The previous prime is 861299. The next prime is 861347. The reversal of 861317 is 713168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835396 + 25921 = 914^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 861317 - 2¹² = 857221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430658 + 430659.

It is an arithmetic number, because the mean of its divisors is an integer number (430659).

2⁸⁶¹³¹⁷ is an apocalyptic number.

It is an amenable number.

861317 is a deficient number, since it is larger than the sum of its proper divisors (1).

861317 is an equidigital number, since it uses as much as digits as its factorization.

861317 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 861317 is about 928.0716567162. The cubic root of 861317 is about 95.1453729985.

The spelling of 861317 in words is "eight hundred sixty-one thousand, three hundred seventeen".