5238418649 has 2 divisors, whose sum is σ = 5238418650. Its totient is φ = 5238418648.

The previous prime is 5238418639. The next prime is 5238418681. The reversal of 5238418649 is 9468148325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4304016025 + 934402624 = 65605^2 + 30568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5238418649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5238418597 and 5238418606.

It is not a weakly prime, because it can be changed into another prime (5238418609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619209324 + 2619209325.

It is an arithmetic number, because the mean of its divisors is an integer number (2619209325).

Almost surely, 2^5238418649 is an apocalyptic number.

It is an amenable number.

5238418649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5238418649 is an equidigital number, since it uses as much as digits as its factorization.

5238418649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 50.

The square root of 5238418649 is about 72376.9206929944. The cubic root of 5238418649 is about 1736.7343788563.

The spelling of 5238418649 in words is "five billion, two hundred thirty-eight million, four hundred eighteen thousand, six hundred forty-nine".