868463909 has 8 divisors (see below), whose sum is σ = 876410520. Its totient is φ = 860553216.

The previous prime is 868463879. The next prime is 868463971. The reversal of 868463909 is 909364868.

It can be written as a sum of positive squares in 4 ways, for example, as 46036225 + 822427684 = 6785^2 + 28678^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 868463909 - 2²⁰ = 867415333 is a prime.

It is a super-2 number, since 2×868463909² = 1508459122471120562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868463209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40847 + ... + 58355.

It is an arithmetic number, because the mean of its divisors is an integer number (109551315).

Almost surely, 2^868463909 is an apocalyptic number.

It is an amenable number.

868463909 is a deficient number, since it is larger than the sum of its proper divisors (7946611).

868463909 is a wasteful number, since it uses less digits than its factorization.

868463909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17959.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 868463909 is about 29469.7117223769. The cubic root of 868463909 is about 954.0780953726.

The spelling of 868463909 in words is "eight hundred sixty-eight million, four hundred sixty-three thousand, nine hundred nine".