3500003561 has 2 divisors, whose sum is σ = 3500003562. Its totient is φ = 3500003560.

The previous prime is 3500003531. The next prime is 3500003603. The reversal of 3500003561 is 1653000053.

3500003561 is digitally balanced in base 2 and base 3, because in such bases 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., 3286843561 + 213160000 = 57331^2 + 14600^2 .

It is an emirp because it is prime and its reverse (1653000053) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3500003561 - 2²⁶ = 3432894697 is a prime.

It is not a weakly prime, because it can be changed into another prime (3500003501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1750001780 + 1750001781.

It is an arithmetic number, because the mean of its divisors is an integer number (1750001781).

Almost surely, 2^3500003561 is an apocalyptic number.

It is an amenable number.

3500003561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3500003561 is an equidigital number, since it uses as much as digits as its factorization.

3500003561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 3500003561 is about 59160.8279269315. The cubic root of 3500003561 is about 1518.2950008564.

The spelling of 3500003561 in words is "three billion, five hundred million, three thousand, five hundred sixty-one".