3985995893 has 4 divisors (see below), whose sum is σ = 4348359168. Its totient is φ = 3623632620.

The previous prime is 3985995817. The next prime is 3985995931.

3985995893 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 3985995893 - 2¹⁰ = 3985994869 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 (3985995193) by changing a digit.

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, 181181621 + ... + 181181642.

It is an arithmetic number, because the mean of its divisors is an integer number (1087089792).

Almost surely, 2^3985995893 is an apocalyptic number.

It is an amenable number.

3985995893 is a deficient number, since it is larger than the sum of its proper divisors (362363275).

3985995893 is a wasteful number, since it uses less digits than its factorization.

3985995893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362363274.

The product of its digits is 94478400, while the sum is 68.

The square root of 3985995893 is about 63134.7439449943. The cubic root of 3985995893 is about 1585.5463746744.

The spelling of 3985995893 in words is "three billion, nine hundred eighty-five million, nine hundred ninety-five thousand, eight hundred ninety-three".