8340121587 has 24 divisors (see below), whose sum is σ = 13154961600. Its totient is φ = 4685002896.

The previous prime is 8340121577. The next prime is 8340121589. The reversal of 8340121587 is 7851210438.

It is not a de Polignac number, because 8340121587 - 2⁶ = 8340121523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8340121589) 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 23 ways as a sum of consecutive naturals, for example, 472137 + ... + 489482.

It is an arithmetic number, because the mean of its divisors is an integer number (548123400).

Almost surely, 2^8340121587 is an apocalyptic number.

8340121587 is a deficient number, since it is larger than the sum of its proper divisors (4814840013).

8340121587 is a wasteful number, since it uses less digits than its factorization.

8340121587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961695 (or 961688 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 8340121587 is about 91324.2661454227. The cubic root of 8340121587 is about 2027.9510161813.

The spelling of 8340121587 in words is "eight billion, three hundred forty million, one hundred twenty-one thousand, five hundred eighty-seven".