3945273289 has 2 divisors, whose sum is σ = 3945273290. Its totient is φ = 3945273288.

The previous prime is 3945273251. The next prime is 3945273313. The reversal of 3945273289 is 9823725493.

3945273289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3767504400 + 177768889 = 61380^2 + 13333^2 .

It is an emirp because it is prime and its reverse (9823725493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3945273289 - 2¹⁵ = 3945240521 is a prime.

It is not a weakly prime, because it can be changed into another prime (3945273089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972636644 + 1972636645.

It is an arithmetic number, because the mean of its divisors is an integer number (1972636645).

Almost surely, 2^3945273289 is an apocalyptic number.

It is an amenable number.

3945273289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3945273289 is an equidigital number, since it uses as much as digits as its factorization.

3945273289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The square root of 3945273289 is about 62811.4105000039. The cubic root of 3945273289 is about 1580.1283462742.

The spelling of 3945273289 in words is "three billion, nine hundred forty-five million, two hundred seventy-three thousand, two hundred eighty-nine".