3920875085 has 4 divisors (see below), whose sum is σ = 4705050108. Its totient is φ = 3136700064.

The previous prime is 3920875073. The next prime is 3920875109. The reversal of 3920875085 is 5805780293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5805780293 = 54941 ⋅105673.

It can be written as a sum of positive squares in 2 ways, for example, as 1310584804 + 2610290281 = 36202^2 + 51091^2 .

It is a cyclic number.

It is not a de Polignac number, because 3920875085 - 2⁴ = 3920875069 is a prime.

It is a super-2 number, since 2×3920875085² = 30746522864347514450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 392087504 + ... + 392087513.

It is an arithmetic number, because the mean of its divisors is an integer number (1176262527).

Almost surely, 2^3920875085 is an apocalyptic number.

It is an amenable number.

3920875085 is a deficient number, since it is larger than the sum of its proper divisors (784175023).

3920875085 is an equidigital number, since it uses as much as digits as its factorization.

3920875085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784175022.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 3920875085 is about 62616.8913712586. The cubic root of 3920875085 is about 1576.8643527756.

The spelling of 3920875085 in words is "three billion, nine hundred twenty million, eight hundred seventy-five thousand, eighty-five".