865825693 has 2 divisors, whose sum is σ = 865825694. Its totient is φ = 865825692.

The previous prime is 865825663. The next prime is 865825699. The reversal of 865825693 is 396528568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 809004249 + 56821444 = 28443^2 + 7538^2 .

It is a cyclic number.

It is not a de Polignac number, because 865825693 - 2²⁹ = 328954781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 865825693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865825699) 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, 432912846 + 432912847.

It is an arithmetic number, because the mean of its divisors is an integer number (432912847).

Almost surely, 2^865825693 is an apocalyptic number.

It is an amenable number.

865825693 is a deficient number, since it is larger than the sum of its proper divisors (1).

865825693 is an equidigital number, since it uses as much as digits as its factorization.

865825693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 52.

The square root of 865825693 is about 29424.9161935935. The cubic root of 865825693 is about 953.1110173106. Note that the first 3 decimals are identical.

The spelling of 865825693 in words is "eight hundred sixty-five million, eight hundred twenty-five thousand, six hundred ninety-three".