3989702065 has 8 divisors (see below), whose sum is σ = 4788700200. Its totient is φ = 3191056512.

The previous prime is 3989702047. The next prime is 3989702117. The reversal of 3989702065 is 5602079893.

It can be written as a sum of positive squares in 4 ways, for example, as 2345561761 + 1644140304 = 48431^2 + 40548^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3989702065 - 2⁵ = 3989702033 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62574 + ... + 109063.

It is an arithmetic number, because the mean of its divisors is an integer number (598587525).

Almost surely, 2^3989702065 is an apocalyptic number.

It is an amenable number.

3989702065 is a deficient number, since it is larger than the sum of its proper divisors (798998135).

3989702065 is a wasteful number, since it uses less digits than its factorization.

3989702065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176291.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 3989702065 is about 63164.0884126416. The cubic root of 3989702065 is about 1586.0376351955.

The spelling of 3989702065 in words is "three billion, nine hundred eighty-nine million, seven hundred two thousand, sixty-five".