865387948693 has 2 divisors, whose sum is σ = 865387948694. Its totient is φ = 865387948692.

The previous prime is 865387948661. The next prime is 865387948729. The reversal of 865387948693 is 396849783568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836452918084 + 28935030609 = 914578^2 + 170103^2 .

It is a cyclic number.

It is not a de Polignac number, because 865387948693 - 2⁵ = 865387948661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865387948643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432693974346 + 432693974347.

It is an arithmetic number, because the mean of its divisors is an integer number (432693974347).

Almost surely, 2^865387948693 is an apocalyptic number.

It is an amenable number.

865387948693 is a deficient number, since it is larger than the sum of its proper divisors (1).

865387948693 is an equidigital number, since it uses as much as digits as its factorization.

865387948693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1881169920, while the sum is 76.

The spelling of 865387948693 in words is "eight hundred sixty-five billion, three hundred eighty-seven million, nine hundred forty-eight thousand, six hundred ninety-three".