3521868509 has 2 divisors, whose sum is σ = 3521868510. Its totient is φ = 3521868508.

The previous prime is 3521868499. The next prime is 3521868521. The reversal of 3521868509 is 9058681253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3386076100 + 135792409 = 58190^2 + 11653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3521868509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3521868109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760934254 + 1760934255.

It is an arithmetic number, because the mean of its divisors is an integer number (1760934255).

Almost surely, 2^3521868509 is an apocalyptic number.

It is an amenable number.

3521868509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521868509 is an equidigital number, since it uses as much as digits as its factorization.

3521868509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 3521868509 is about 59345.3326639930. The cubic root of 3521868509 is about 1521.4500977116.

The spelling of 3521868509 in words is "three billion, five hundred twenty-one million, eight hundred sixty-eight thousand, five hundred nine".