8363651209 has 3 divisors (see below), whose sum is σ = 8363742663. Its totient is φ = 8363559756.

The previous prime is 8363651189. The next prime is 8363651221. The reversal of 8363651209 is 9021563638.

The square root of 8363651209 is 91453.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2613765625 + 5749885584 = 51125^2 + 75828^2 .

It is not a de Polignac number, because 8363651209 - 2³¹ = 6216167561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8363658209) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45727 + ... + 137179.

It is an arithmetic number, because the mean of its divisors is an integer number (2787914221).

Almost surely, 2^8363651209 is an apocalyptic number.

8363651209 is the 91453-rd square number.

8363651209 is the 45727-th centered octagonal number.

It is an amenable number.

8363651209 is a deficient number, since it is larger than the sum of its proper divisors (91454).

8363651209 is an frugal number, since it uses more digits than its factorization.

8363651209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182906 (or 91453 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The cubic root of 8363651209 is about 2029.8563488018.

The spelling of 8363651209 in words is "eight billion, three hundred sixty-three million, six hundred fifty-one thousand, two hundred nine".