8513930891 has 4 divisors (see below), whose sum is σ = 8721587784. Its totient is φ = 8306274000.

The previous prime is 8513930881. The next prime is 8513930911. The reversal of 8513930891 is 1980393158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1980393158 = 2 ⋅990196579.

It is a cyclic number.

It is not a de Polignac number, because 8513930891 - 2⁶ = 8513930827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8513930801) 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, 103828385 + ... + 103828466.

It is an arithmetic number, because the mean of its divisors is an integer number (2180396946).

Almost surely, 2^8513930891 is an apocalyptic number.

8513930891 is a deficient number, since it is larger than the sum of its proper divisors (207656893).

8513930891 is a wasteful number, since it uses less digits than its factorization.

8513930891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207656892.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 8513930891 is about 92270.9645067179. The cubic root of 8513930891 is about 2041.9418657984.

The spelling of 8513930891 in words is "eight billion, five hundred thirteen million, nine hundred thirty thousand, eight hundred ninety-one".