8379204921 has 8 divisors (see below), whose sum is σ = 12413636960. Its totient is φ = 5586136596.

The previous prime is 8379204913. The next prime is 8379204961. The reversal of 8379204921 is 1294029738.

It is not a de Polignac number, because 8379204921 - 2³ = 8379204913 is a prime.

It is a super-2 number, since 2×8379204921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8379204961) 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 7 ways as a sum of consecutive naturals, for example, 155170435 + ... + 155170488.

It is an arithmetic number, because the mean of its divisors is an integer number (1551704620).

Almost surely, 2^8379204921 is an apocalyptic number.

It is an amenable number.

8379204921 is a deficient number, since it is larger than the sum of its proper divisors (4034432039).

8379204921 is a wasteful number, since it uses less digits than its factorization.

8379204921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310340932 (or 310340926 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 8379204921 is about 91537.9971432629. The cubic root of 8379204921 is about 2031.1138637838.

The spelling of 8379204921 in words is "eight billion, three hundred seventy-nine million, two hundred four thousand, nine hundred twenty-one".