8167018493 has 4 divisors (see below), whose sum is σ = 8366214108. Its totient is φ = 7967822880.

The previous prime is 8167018481. The next prime is 8167018511. The reversal of 8167018493 is 3948107618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2638055044 + 5528963449 = 51362^2 + 74357^2 .

It is a cyclic number.

It is not a de Polignac number, because 8167018493 - 2⁴ = 8167018477 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 (8167018793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99597746 + ... + 99597827.

It is an arithmetic number, because the mean of its divisors is an integer number (2091553527).

Almost surely, 2^8167018493 is an apocalyptic number.

It is an amenable number.

8167018493 is a deficient number, since it is larger than the sum of its proper divisors (199195615).

8167018493 is a wasteful number, since it uses less digits than its factorization.

8167018493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199195614.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 8167018493 is about 90371.5579870127. The cubic root of 8167018493 is about 2013.8224575073.

The spelling of 8167018493 in words is "eight billion, one hundred sixty-seven million, eighteen thousand, four hundred ninety-three".