2042440139 has 2 divisors, whose sum is σ = 2042440140. Its totient is φ = 2042440138.

The previous prime is 2042440097. The next prime is 2042440151. The reversal of 2042440139 is 9310442402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2042440139 - 2¹² = 2042436043 is a prime.

It is not a weakly prime, because it can be changed into another prime (2042440339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021220069 + 1021220070.

It is an arithmetic number, because the mean of its divisors is an integer number (1021220070).

Almost surely, 2^2042440139 is an apocalyptic number.

2042440139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042440139 is an equidigital number, since it uses as much as digits as its factorization.

2042440139 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 2042440139 is about 45193.3638823224. The cubic root of 2042440139 is about 1268.7706165885.

The spelling of 2042440139 in words is "two billion, forty-two million, four hundred forty thousand, one hundred thirty-nine".