3894642289 has 2 divisors, whose sum is σ = 3894642290. Its totient is φ = 3894642288.

The previous prime is 3894642223. The next prime is 3894642331. The reversal of 3894642289 is 9822464983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2541873889 + 1352768400 = 50417^2 + 36780^2 .

It is a cyclic number.

It is not a de Polignac number, because 3894642289 - 2²³ = 3886253681 is a prime.

It is not a weakly prime, because it can be changed into another prime (3894642989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947321144 + 1947321145.

It is an arithmetic number, because the mean of its divisors is an integer number (1947321145).

Almost surely, 2^3894642289 is an apocalyptic number.

It is an amenable number.

3894642289 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894642289 is an equidigital number, since it uses as much as digits as its factorization.

3894642289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 55.

The square root of 3894642289 is about 62407.0692229654. The cubic root of 3894642289 is about 1573.3397860094.

The spelling of 3894642289 in words is "three billion, eight hundred ninety-four million, six hundred forty-two thousand, two hundred eighty-nine".