3521306749 has 2 divisors, whose sum is σ = 3521306750. Its totient is φ = 3521306748.

The previous prime is 3521306743. The next prime is 3521306797. The reversal of 3521306749 is 9476031253.

It is a happy number.

3521306749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2904132100 + 617174649 = 53890^2 + 24843^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521306749 - 2³ = 3521306741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3521306741) by changing a digit.

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 as a sum of consecutive naturals, namely, 1760653374 + 1760653375.

It is an arithmetic number, because the mean of its divisors is an integer number (1760653375).

Almost surely, 2^3521306749 is an apocalyptic number.

It is an amenable number.

3521306749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521306749 is an equidigital number, since it uses as much as digits as its factorization.

3521306749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 3521306749 is about 59340.5994998365. The cubic root of 3521306749 is about 1521.3691998159.

The spelling of 3521306749 in words is "three billion, five hundred twenty-one million, three hundred six thousand, seven hundred forty-nine".