3445675621 has 2 divisors, whose sum is σ = 3445675622. Its totient is φ = 3445675620.

The previous prime is 3445675619. The next prime is 3445675633. The reversal of 3445675621 is 1265765443.

3445675621 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., 3444398721 + 1276900 = 58689^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 3445675621 - 2¹ = 3445675619 is a prime.

Together with 3445675619, 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 (3445675601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722837810 + 1722837811.

It is an arithmetic number, because the mean of its divisors is an integer number (1722837811).

Almost surely, 2^3445675621 is an apocalyptic number.

It is an amenable number.

3445675621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3445675621 is an equidigital number, since it uses as much as digits as its factorization.

3445675621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 3445675621 is about 58699.8775211669. The cubic root of 3445675621 is about 1510.3982139080.

The spelling of 3445675621 in words is "three billion, four hundred forty-five million, six hundred seventy-five thousand, six hundred twenty-one".