839865316361 has 2 divisors, whose sum is σ = 839865316362. Its totient is φ = 839865316360.

The previous prime is 839865316307. The next prime is 839865316463. The reversal of 839865316361 is 163613568938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 784209429136 + 55655887225 = 885556^2 + 235915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839865316361 is a prime.

It is a super-2 number, since 2×839865316361² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 839865316361.

It is not a weakly prime, because it can be changed into another prime (839865316861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419932658180 + 419932658181.

It is an arithmetic number, because the mean of its divisors is an integer number (419932658181).

Almost surely, 2^839865316361 is an apocalyptic number.

It is an amenable number.

839865316361 is a deficient number, since it is larger than the sum of its proper divisors (1).

839865316361 is an equidigital number, since it uses as much as digits as its factorization.

839865316361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 59.

The spelling of 839865316361 in words is "eight hundred thirty-nine billion, eight hundred sixty-five million, three hundred sixteen thousand, three hundred sixty-one".