8187808493 has 4 divisors (see below), whose sum is σ = 8378222688. Its totient is φ = 7997394300.

The previous prime is 8187808451. The next prime is 8187808523. The reversal of 8187808493 is 3948087818.

8187808493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3948087818 = 2 ⋅1974043909.

It is a cyclic number.

It is not a de Polignac number, because 8187808493 - 2⁶ = 8187808429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8187808423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95207033 + ... + 95207118.

It is an arithmetic number, because the mean of its divisors is an integer number (2094555672).

Almost surely, 2^8187808493 is an apocalyptic number.

It is an amenable number.

8187808493 is a deficient number, since it is larger than the sum of its proper divisors (190414195).

8187808493 is a wasteful number, since it uses less digits than its factorization.

8187808493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190414194.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The square root of 8187808493 is about 90486.5100056356. The cubic root of 8187808493 is about 2015.5298081625.

The spelling of 8187808493 in words is "eight billion, one hundred eighty-seven million, eight hundred eight thousand, four hundred ninety-three".