3894789949 has 2 divisors, whose sum is σ = 3894789950. Its totient is φ = 3894789948.

The previous prime is 3894789901. The next prime is 3894789967. The reversal of 3894789949 is 9499874983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3619827225 + 274962724 = 60165^2 + 16582^2 .

It is an emirp because it is prime and its reverse (9499874983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3894789949 - 2¹¹ = 3894787901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3894789979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947394974 + 1947394975.

It is an arithmetic number, because the mean of its divisors is an integer number (1947394975).

Almost surely, 2^3894789949 is an apocalyptic number.

It is an amenable number.

3894789949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894789949 is an equidigital number, since it uses as much as digits as its factorization.

3894789949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 70.

The square root of 3894789949 is about 62408.2522508041. The cubic root of 3894789949 is about 1573.3596694287.

The spelling of 3894789949 in words is "three billion, eight hundred ninety-four million, seven hundred eighty-nine thousand, nine hundred forty-nine".