3840721139 has 2 divisors, whose sum is σ = 3840721140. Its totient is φ = 3840721138.

The previous prime is 3840721121. The next prime is 3840721163. The reversal of 3840721139 is 9311270483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3840721139 - 2¹⁶ = 3840655603 is a prime.

It is a super-2 number, since 2×3840721139² = 29502277735122914642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3840721189) 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, 1920360569 + 1920360570.

It is an arithmetic number, because the mean of its divisors is an integer number (1920360570).

Almost surely, 2^3840721139 is an apocalyptic number.

3840721139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840721139 is an equidigital number, since it uses as much as digits as its factorization.

3840721139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 3840721139 is about 61973.5519314490. The cubic root of 3840721139 is about 1566.0450768504.

The spelling of 3840721139 in words is "three billion, eight hundred forty million, seven hundred twenty-one thousand, one hundred thirty-nine".