3849061921 has 2 divisors, whose sum is σ = 3849061922. Its totient is φ = 3849061920.

The previous prime is 3849061903. The next prime is 3849061969. The reversal of 3849061921 is 1291609483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3824061921 + 25000000 = 61839^2 + 5000^2 .

It is an emirp because it is prime and its reverse (1291609483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3849061921 - 2⁵ = 3849061889 is a prime.

It is not a weakly prime, because it can be changed into another prime (3849061901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1924530960 + 1924530961.

It is an arithmetic number, because the mean of its divisors is an integer number (1924530961).

Almost surely, 2^3849061921 is an apocalyptic number.

It is an amenable number.

3849061921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3849061921 is an equidigital number, since it uses as much as digits as its factorization.

3849061921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3849061921 is about 62040.8085134293. The cubic root of 3849061921 is about 1567.1779019999.

The spelling of 3849061921 in words is "three billion, eight hundred forty-nine million, sixty-one thousand, nine hundred twenty-one".