8368392521 has 4 divisors (see below), whose sum is σ = 8371345092. Its totient is φ = 8365439952.

The previous prime is 8368392419. The next prime is 8368392533. The reversal of 8368392521 is 1252938638.

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 2853696400 + 5514696121 = 53420^2 + 74261^2 .

It is a cyclic number.

It is not a de Polignac number, because 8368392521 - 2¹⁰ = 8368391497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8368392551) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1472030 + ... + 1477703.

It is an arithmetic number, because the mean of its divisors is an integer number (2092836273).

Almost surely, 2^8368392521 is an apocalyptic number.

It is an amenable number.

8368392521 is a deficient number, since it is larger than the sum of its proper divisors (2952571).

8368392521 is a wasteful number, since it uses less digits than its factorization.

8368392521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952570.

The product of its digits is 622080, while the sum is 47.

The square root of 8368392521 is about 91478.9184511929. The cubic root of 8368392521 is about 2030.2398481437.

The spelling of 8368392521 in words is "eight billion, three hundred sixty-eight million, three hundred ninety-two thousand, five hundred twenty-one".