44004139 has 2 divisors, whose sum is σ = 44004140. Its totient is φ = 44004138.

The previous prime is 44004131. The next prime is 44004157. The reversal of 44004139 is 93140044.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44004139 - 2³ = 44004131 is a prime.

It is not a weakly prime, because it can be changed into another prime (44004131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22002069 + 22002070.

It is an arithmetic number, because the mean of its divisors is an integer number (22002070).

Almost surely, 2^44004139 is an apocalyptic number.

44004139 is a deficient number, since it is larger than the sum of its proper divisors (1).

44004139 is an equidigital number, since it uses as much as digits as its factorization.

44004139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 44004139 is about 6633.5615622379. The cubic root of 44004139 is about 353.0459029672.

The spelling of 44004139 in words is "forty-four million, four thousand, one hundred thirty-nine".