440422139 has 2 divisors, whose sum is σ = 440422140. Its totient is φ = 440422138.

The previous prime is 440422117. The next prime is 440422163. The reversal of 440422139 is 931224044.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440422139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (440472139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220211069 + 220211070.

It is an arithmetic number, because the mean of its divisors is an integer number (220211070).

Almost surely, 2^440422139 is an apocalyptic number.

440422139 is a deficient number, since it is larger than the sum of its proper divisors (1).

440422139 is an equidigital number, since it uses as much as digits as its factorization.

440422139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 440422139 is about 20986.2368946889. The cubic root of 440422139 is about 760.8336529735.

The spelling of 440422139 in words is "four hundred forty million, four hundred twenty-two thousand, one hundred thirty-nine".