3545220073 has 2 divisors, whose sum is σ = 3545220074. Its totient is φ = 3545220072.

The previous prime is 3545220061. The next prime is 3545220221. The reversal of 3545220073 is 3700225453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2823115689 + 722104384 = 53133^2 + 26872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3545220073 is a prime.

It is not a weakly prime, because it can be changed into another prime (3545220053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772610036 + 1772610037.

It is an arithmetic number, because the mean of its divisors is an integer number (1772610037).

Almost surely, 2^3545220073 is an apocalyptic number.

It is an amenable number.

3545220073 is a deficient number, since it is larger than the sum of its proper divisors (1).

3545220073 is an equidigital number, since it uses as much as digits as its factorization.

3545220073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 3545220073 is about 59541.7506712727. The cubic root of 3545220073 is about 1524.8053246793.

The spelling of 3545220073 in words is "three billion, five hundred forty-five million, two hundred twenty thousand, seventy-three".