8742921579 has 18 divisors (see below), whose sum is σ = 14690488020. Its totient is φ = 4995954936.

The previous prime is 8742921559. The next prime is 8742921581. The reversal of 8742921579 is 9751292478.

8742921579 is a `hidden beast` number, since 8 + 7 + 42 + 9 + 21 + 579 = 666.

It is not a de Polignac number, because 8742921579 - 2⁸ = 8742921323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8742921559) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9912169 + ... + 9913050.

Almost surely, 2^8742921579 is an apocalyptic number.

8742921579 is a deficient number, since it is larger than the sum of its proper divisors (5947566441).

8742921579 is a wasteful number, since it uses less digits than its factorization.

8742921579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19825239 (or 19825229 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 8742921579 is about 93503.5912625820. The cubic root of 8742921579 is about 2060.0868391928.

The spelling of 8742921579 in words is "eight billion, seven hundred forty-two million, nine hundred twenty-one thousand, five hundred seventy-nine".