3974985693 has 36 divisors (see below), whose sum is σ = 6741558720. Its totient is φ = 2250165456.

The previous prime is 3974985689. The next prime is 3974985709. The reversal of 3974985693 is 3965894793.

3974985693 is a `hidden beast` number, since 3 + 9 + 7 + 498 + 56 + 93 = 666.

It is not a de Polignac number, because 3974985693 - 2² = 3974985689 is a prime.

It is a super-2 number, since 2×3974985693² = 31601022519109380498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3974985693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974985673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5068 + ... + 89306.

It is an arithmetic number, because the mean of its divisors is an integer number (187265520).

Almost surely, 2^3974985693 is an apocalyptic number.

It is an amenable number.

3974985693 is a deficient number, since it is larger than the sum of its proper divisors (2766573027).

3974985693 is a wasteful number, since it uses less digits than its factorization.

3974985693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84366 (or 84356 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 63.

The square root of 3974985693 is about 63047.4876026000. The cubic root of 3974985693 is about 1584.0851521506.

The spelling of 3974985693 in words is "three billion, nine hundred seventy-four million, nine hundred eighty-five thousand, six hundred ninety-three".