3993716985 has 16 divisors (see below), whose sum is σ = 6479948160. Its totient is φ = 2099982080.

The previous prime is 3993716981. The next prime is 3993716999. The reversal of 3993716985 is 5896173993.

It is not a de Polignac number, because 3993716985 - 2² = 3993716981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3993716981) 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 15 ways as a sum of consecutive naturals, for example, 1873920 + ... + 1876049.

It is an arithmetic number, because the mean of its divisors is an integer number (404996760).

Almost surely, 2^3993716985 is an apocalyptic number.

It is an amenable number.

3993716985 is a deficient number, since it is larger than the sum of its proper divisors (2486231175).

3993716985 is a wasteful number, since it uses less digits than its factorization.

3993716985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750048.

The product of its digits is 11022480, while the sum is 60.

The square root of 3993716985 is about 63195.8620876399. The cubic root of 3993716985 is about 1586.5694776983.

The spelling of 3993716985 in words is "three billion, nine hundred ninety-three million, seven hundred sixteen thousand, nine hundred eighty-five".