8543978099 has 16 divisors (see below), whose sum is σ = 9306000576. Its totient is φ = 7811481600.

The previous prime is 8543978089. The next prime is 8543978101. The reversal of 8543978099 is 9908793458.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8543978099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8543978039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392594 + ... + 413784.

It is an arithmetic number, because the mean of its divisors is an integer number (581625036).

Almost surely, 2^8543978099 is an apocalyptic number.

8543978099 is a deficient number, since it is larger than the sum of its proper divisors (762022477).

8543978099 is a wasteful number, since it uses less digits than its factorization.

8543978099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21886.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The square root of 8543978099 is about 92433.6415976348. The cubic root of 8543978099 is about 2044.3411733449.

The spelling of 8543978099 in words is "eight billion, five hundred forty-three million, nine hundred seventy-eight thousand, ninety-nine".