3840139 has 2 divisors, whose sum is σ = 3840140. Its totient is φ = 3840138.

The previous prime is 3840127. The next prime is 3840157. The reversal of 3840139 is 9310483.

3840139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3840139 - 2⁵ = 3840107 is a prime.

It is equal to p₂₇₂₆₅₆ and since 3840139 and 272656 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3840169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920069 + 1920070.

It is an arithmetic number, because the mean of its divisors is an integer number (1920070).

Almost surely, 2^3840139 is an apocalyptic number.

3840139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840139 is an equidigital number, since it uses as much as digits as its factorization.

3840139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3840139 is about 1959.6272604758. The cubic root of 3840139 is about 156.5965950913.

The spelling of 3840139 in words is "three million, eight hundred forty thousand, one hundred thirty-nine".