3849639121 has 2 divisors, whose sum is σ = 3849639122. Its totient is φ = 3849639120.

The previous prime is 3849639089. The next prime is 3849639127. The reversal of 3849639121 is 1219369483.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3520760896 + 328878225 = 59336^2 + 18135^2 .

It is a cyclic number.

It is not a de Polignac number, because 3849639121 - 2⁵ = 3849639089 is a prime.

It is not a weakly prime, because it can be changed into another prime (3849639127) 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, 1924819560 + 1924819561.

It is an arithmetic number, because the mean of its divisors is an integer number (1924819561).

Almost surely, 2^3849639121 is an apocalyptic number.

It is an amenable number.

3849639121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3849639121 is an equidigital number, since it uses as much as digits as its factorization.

3849639121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 3849639121 is about 62045.4601159505. The cubic root of 3849639121 is about 1567.2562353611.

The spelling of 3849639121 in words is "three billion, eight hundred forty-nine million, six hundred thirty-nine thousand, one hundred twenty-one".