5249138689 has 2 divisors, whose sum is σ = 5249138690. Its totient is φ = 5249138688.

The previous prime is 5249138677. The next prime is 5249138711. The reversal of 5249138689 is 9868319425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5179249089 + 69889600 = 71967^2 + 8360^2 .

It is a cyclic number.

It is not a de Polignac number, because 5249138689 - 2⁷ = 5249138561 is a prime.

It is not a weakly prime, because it can be changed into another prime (5249138659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2624569344 + 2624569345.

It is an arithmetic number, because the mean of its divisors is an integer number (2624569345).

Almost surely, 2^5249138689 is an apocalyptic number.

It is an amenable number.

5249138689 is a deficient number, since it is larger than the sum of its proper divisors (1).

5249138689 is an equidigital number, since it uses as much as digits as its factorization.

5249138689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 55.

The square root of 5249138689 is about 72450.9398765813. The cubic root of 5249138689 is about 1737.9182715312.

It can be divided in two parts, 52 and 49138689, that added together give a triangular number (49138741 = T₉₉₁₃).

The spelling of 5249138689 in words is "five billion, two hundred forty-nine million, one hundred thirty-eight thousand, six hundred eighty-nine".