5244442139 has 2 divisors, whose sum is σ = 5244442140. Its totient is φ = 5244442138.

The previous prime is 5244442127. The next prime is 5244442141. The reversal of 5244442139 is 9312444425.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5244442139 - 2²⁰ = 5243393563 is a prime.

Together with 5244442141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5244442439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622221069 + 2622221070.

It is an arithmetic number, because the mean of its divisors is an integer number (2622221070).

Almost surely, 2^5244442139 is an apocalyptic number.

5244442139 is a deficient number, since it is larger than the sum of its proper divisors (1).

5244442139 is an equidigital number, since it uses as much as digits as its factorization.

5244442139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The square root of 5244442139 is about 72418.5206904974. The cubic root of 5244442139 is about 1737.3997956393.

The spelling of 5244442139 in words is "five billion, two hundred forty-four million, four hundred forty-two thousand, one hundred thirty-nine".