5191778939 has 2 divisors, whose sum is σ = 5191778940. Its totient is φ = 5191778938.

The previous prime is 5191778897. The next prime is 5191778947. The reversal of 5191778939 is 9398771915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5191778939 - 2²⁴ = 5175001723 is a prime.

It is not a weakly prime, because it can be changed into another prime (5191777939) 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, 2595889469 + 2595889470.

It is an arithmetic number, because the mean of its divisors is an integer number (2595889470).

Almost surely, 2^5191778939 is an apocalyptic number.

5191778939 is a deficient number, since it is larger than the sum of its proper divisors (1).

5191778939 is an equidigital number, since it uses as much as digits as its factorization.

5191778939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 59.

The square root of 5191778939 is about 72054.0001596025. Note that the first 3 decimals coincide. The cubic root of 5191778939 is about 1731.5647285354.

The spelling of 5191778939 in words is "five billion, one hundred ninety-one million, seven hundred seventy-eight thousand, nine hundred thirty-nine".