3521689 has 2 divisors, whose sum is σ = 3521690. Its totient is φ = 3521688.

The previous prime is 3521677. The next prime is 3521699. The reversal of 3521689 is 9861253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3003289 + 518400 = 1733^2 + 720^2 .

It is an emirp because it is prime and its reverse (9861253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3521689 - 2⁷ = 3521561 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3521659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760844 + 1760845.

It is an arithmetic number, because the mean of its divisors is an integer number (1760845).

Almost surely, 2^3521689 is an apocalyptic number.

It is an amenable number.

3521689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521689 is an equidigital number, since it uses as much as digits as its factorization.

3521689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 3521689 is about 1876.6163699595. The cubic root of 3521689 is about 152.1424247927.

The spelling of 3521689 in words is "three million, five hundred twenty-one thousand, six hundred eighty-nine".