3965828081 has 4 divisors (see below), whose sum is σ = 3969566964. Its totient is φ = 3962089200.

The previous prime is 3965828077. The next prime is 3965828093. The reversal of 3965828081 is 1808285693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1849000000 + 2116828081 = 43000^2 + 46009^2 .

It is a cyclic number.

It is not a de Polignac number, because 3965828081 - 2² = 3965828077 is a prime.

It is a super-2 number, since 2×3965828081² = 31455584736096285122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3965828071) 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, 1867850 + ... + 1869971.

It is an arithmetic number, because the mean of its divisors is an integer number (992391741).

Almost surely, 2^3965828081 is an apocalyptic number.

It is an amenable number.

3965828081 is a deficient number, since it is larger than the sum of its proper divisors (3738883).

3965828081 is a wasteful number, since it uses less digits than its factorization.

3965828081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738882.

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 3965828081 is about 62974.8210080823. The cubic root of 3965828081 is about 1582.8677396763.

The spelling of 3965828081 in words is "three billion, nine hundred sixty-five million, eight hundred twenty-eight thousand, eighty-one".