8387134729 has 4 divisors (see below), whose sum is σ = 8613814084. Its totient is φ = 8160455376.

The previous prime is 8387134727. The next prime is 8387134733. The reversal of 8387134729 is 9274317838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9274317838 = 2 ⋅4637158919.

It can be written as a sum of positive squares in 2 ways, for example, as 5811775225 + 2575359504 = 76235^2 + 50748^2 .

It is not a de Polignac number, because 8387134729 - 2¹ = 8387134727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8387134727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113339622 + ... + 113339695.

It is an arithmetic number, because the mean of its divisors is an integer number (2153453521).

Almost surely, 2^8387134729 is an apocalyptic number.

It is an amenable number.

8387134729 is a deficient number, since it is larger than the sum of its proper divisors (226679355).

8387134729 is a wasteful number, since it uses less digits than its factorization.

8387134729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226679354.

The product of its digits is 2032128, while the sum is 52.

The square root of 8387134729 is about 91581.3011973514. The cubic root of 8387134729 is about 2031.7543885491.

The spelling of 8387134729 in words is "eight billion, three hundred eighty-seven million, one hundred thirty-four thousand, seven hundred twenty-nine".