3868842517 has 4 divisors (see below), whose sum is σ = 3869047276. Its totient is φ = 3868637760.

The previous prime is 3868842511. The next prime is 3868842521. The reversal of 3868842517 is 7152488683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7152488683 = 33301 ⋅214783.

It can be written as a sum of positive squares in 2 ways, for example, as 2010715281 + 1858127236 = 44841^2 + 43106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3868842517 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 (3868842511) 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, 70788 + ... + 112909.

It is an arithmetic number, because the mean of its divisors is an integer number (967261819).

Almost surely, 2^3868842517 is an apocalyptic number.

It is an amenable number.

3868842517 is a deficient number, since it is larger than the sum of its proper divisors (204759).

3868842517 is a wasteful number, since it uses less digits than its factorization.

3868842517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204758.

The product of its digits is 2580480, while the sum is 52.

The square root of 3868842517 is about 62200.0202331157. The cubic root of 3868842517 is about 1569.8579282370.

The spelling of 3868842517 in words is "three billion, eight hundred sixty-eight million, eight hundred forty-two thousand, five hundred seventeen".