44140139 has 2 divisors, whose sum is σ = 44140140. Its totient is φ = 44140138.

The previous prime is 44140121. The next prime is 44140163. The reversal of 44140139 is 93104144.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44140139 - 2¹⁶ = 44074603 is a prime.

It is a Chen prime.

It is equal to p_2669300 and since 44140139 and 2669300 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 (44140039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22070069 + 22070070.

It is an arithmetic number, because the mean of its divisors is an integer number (22070070).

Almost surely, 2^44140139 is an apocalyptic number.

44140139 is a deficient number, since it is larger than the sum of its proper divisors (1).

44140139 is an equidigital number, since it uses as much as digits as its factorization.

44140139 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 26.

The square root of 44140139 is about 6643.8045576311. The cubic root of 44140139 is about 353.4092389630.

The spelling of 44140139 in words is "forty-four million, one hundred forty thousand, one hundred thirty-nine".