867641825 has 6 divisors (see below), whose sum is σ = 1075875894. Its totient is φ = 694113440.

The previous prime is 867641779. The next prime is 867641839. The reversal of 867641825 is 528146768.

It can be written as a sum of positive squares in 3 ways, for example, as 8976016 + 858665809 = 2996^2 + 29303^2 .

It is not a de Polignac number, because 867641825 - 2¹⁰ = 867640801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 867641825.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17352812 + ... + 17352861.

It is an arithmetic number, because the mean of its divisors is an integer number (179312649).

Almost surely, 2^867641825 is an apocalyptic number.

It is an amenable number.

867641825 is a deficient number, since it is larger than the sum of its proper divisors (208234069).

867641825 is a wasteful number, since it uses less digits than its factorization.

867641825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34705683 (or 34705678 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 867641825 is about 29455.7604722743. The cubic root of 867641825 is about 953.7769583341.

The spelling of 867641825 in words is "eight hundred sixty-seven million, six hundred forty-one thousand, eight hundred twenty-five".