868466849 has 4 divisors (see below), whose sum is σ = 891938964. Its totient is φ = 844994736.

The previous prime is 868466813. The next prime is 868466869. The reversal of 868466849 is 948664868.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 515290000 + 353176849 = 22700^2 + 18793^2 .

It is a cyclic number.

It is not a de Polignac number, because 868466849 - 2¹² = 868462753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (868466869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11736002 + ... + 11736075.

It is an arithmetic number, because the mean of its divisors is an integer number (222984741).

Almost surely, 2^868466849 is an apocalyptic number.

It is an amenable number.

868466849 is a deficient number, since it is larger than the sum of its proper divisors (23472115).

868466849 is a wasteful number, since it uses less digits than its factorization.

868466849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23472114.

The product of its digits is 15925248, while the sum is 59.

The square root of 868466849 is about 29469.7616040578. The cubic root of 868466849 is about 954.0791719810.

The spelling of 868466849 in words is "eight hundred sixty-eight million, four hundred sixty-six thousand, eight hundred forty-nine".