5138778839 has 2 divisors, whose sum is σ = 5138778840. Its totient is φ = 5138778838.

The previous prime is 5138778809. The next prime is 5138778923. The reversal of 5138778839 is 9388778315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5138778839 - 2²⁴ = 5122001623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5138778809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569389419 + 2569389420.

It is an arithmetic number, because the mean of its divisors is an integer number (2569389420).

Almost surely, 2^5138778839 is an apocalyptic number.

5138778839 is a deficient number, since it is larger than the sum of its proper divisors (1).

5138778839 is an equidigital number, since it uses as much as digits as its factorization.

5138778839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 59.

The square root of 5138778839 is about 71685.2763055287. The cubic root of 5138778839 is about 1725.6523572244.

The spelling of 5138778839 in words is "five billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, eight hundred thirty-nine".