3520728349 has 2 divisors, whose sum is σ = 3520728350. Its totient is φ = 3520728348.

The previous prime is 3520728347. The next prime is 3520728353. The reversal of 3520728349 is 9438270253.

3520728349 is digitally balanced in base 2, 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., 3323522500 + 197205849 = 57650^2 + 14043^2 .

It is an emirp because it is prime and its reverse (9438270253) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3520728349 - 2¹ = 3520728347 is a prime.

Together with 3520728347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3520728347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760364174 + 1760364175.

It is an arithmetic number, because the mean of its divisors is an integer number (1760364175).

Almost surely, 2^3520728349 is an apocalyptic number.

It is an amenable number.

3520728349 is a deficient number, since it is larger than the sum of its proper divisors (1).

3520728349 is an equidigital number, since it uses as much as digits as its factorization.

3520728349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 3520728349 is about 59335.7257392205. The cubic root of 3520728349 is about 1521.2858966378.

The spelling of 3520728349 in words is "three billion, five hundred twenty million, seven hundred twenty-eight thousand, three hundred forty-nine".