8379634021 has 4 divisors (see below), whose sum is σ = 9141418944. Its totient is φ = 7617849100.

The previous prime is 8379634009. The next prime is 8379634027. The reversal of 8379634021 is 1204369738.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8379634021 - 2¹¹ = 8379631973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8379634027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380892445 + ... + 380892466.

It is an arithmetic number, because the mean of its divisors is an integer number (2285354736).

Almost surely, 2^8379634021 is an apocalyptic number.

It is an amenable number.

8379634021 is a deficient number, since it is larger than the sum of its proper divisors (761784923).

8379634021 is a wasteful number, since it uses less digits than its factorization.

8379634021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761784922.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 8379634021 is about 91540.3409486768. The cubic root of 8379634021 is about 2031.1485343797.

The spelling of 8379634021 in words is "eight billion, three hundred seventy-nine million, six hundred thirty-four thousand, twenty-one".