5193385781 has 2 divisors, whose sum is σ = 5193385782. Its totient is φ = 5193385780.

The previous prime is 5193385753. The next prime is 5193385787. The reversal of 5193385781 is 1875833915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5178097681 + 15288100 = 71959^2 + 3910^2 .

It is a cyclic number.

It is not a de Polignac number, because 5193385781 - 2²² = 5189191477 is a prime.

It is a super-2 number, since 2×5193385781² = 53942511740585959922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5193385787) 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, 2596692890 + 2596692891.

It is an arithmetic number, because the mean of its divisors is an integer number (2596692891).

Almost surely, 2^5193385781 is an apocalyptic number.

It is an amenable number.

5193385781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5193385781 is an equidigital number, since it uses as much as digits as its factorization.

5193385781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 50.

The square root of 5193385781 is about 72065.1495592703. The cubic root of 5193385781 is about 1731.7433483604.

The spelling of 5193385781 in words is "five billion, one hundred ninety-three million, three hundred eighty-five thousand, seven hundred eighty-one".