3520020065 has 4 divisors (see below), whose sum is σ = 4224024084. Its totient is φ = 2816016048.

The previous prime is 3520020061. The next prime is 3520020103. The reversal of 3520020065 is 5600200253.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5600200253 = 773 ⋅7244761.

It can be written as a sum of positive squares in 2 ways, for example, as 2467406929 + 1052613136 = 49673^2 + 32444^2 .

It is a cyclic number.

It is not a de Polignac number, because 3520020065 - 2² = 3520020061 is a prime.

It is a Duffinian number.

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 3520020065.

It is not an unprimeable number, because it can be changed into a prime (3520020061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352002002 + ... + 352002011.

It is an arithmetic number, because the mean of its divisors is an integer number (1056006021).

Almost surely, 2^3520020065 is an apocalyptic number.

It is an amenable number.

3520020065 is a deficient number, since it is larger than the sum of its proper divisors (704004019).

3520020065 is an equidigital number, since it uses as much as digits as its factorization.

3520020065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704004018.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 3520020065 is about 59329.7569942773. The cubic root of 3520020065 is about 1521.1838746870.

The spelling of 3520020065 in words is "three billion, five hundred twenty million, twenty thousand, sixty-five".