865230917 has 2 divisors, whose sum is σ = 865230918. Its totient is φ = 865230916.

The previous prime is 865230901. The next prime is 865230973. The reversal of 865230917 is 719032568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553143361 + 312087556 = 23519^2 + 17666^2 .

It is a cyclic number.

It is not a de Polignac number, because 865230917 - 2⁴ = 865230901 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 (865230217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432615458 + 432615459.

It is an arithmetic number, because the mean of its divisors is an integer number (432615459).

Almost surely, 2^865230917 is an apocalyptic number.

It is an amenable number.

865230917 is a deficient number, since it is larger than the sum of its proper divisors (1).

865230917 is an equidigital number, since it uses as much as digits as its factorization.

865230917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 865230917 is about 29414.8077845156. The cubic root of 865230917 is about 952.8927218655.

The spelling of 865230917 in words is "eight hundred sixty-five million, two hundred thirty thousand, nine hundred seventeen".