5245638889 has 2 divisors, whose sum is σ = 5245638890. Its totient is φ = 5245638888.

The previous prime is 5245638887. The next prime is 5245638943. The reversal of 5245638889 is 9888365425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4824691600 + 420947289 = 69460^2 + 20517^2 .

It is a cyclic number.

It is not a de Polignac number, because 5245638889 - 2¹ = 5245638887 is a prime.

Together with 5245638887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5245638887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2622819444 + 2622819445.

It is an arithmetic number, because the mean of its divisors is an integer number (2622819445).

Almost surely, 2^5245638889 is an apocalyptic number.

It is an amenable number.

5245638889 is a deficient number, since it is larger than the sum of its proper divisors (1).

5245638889 is an equidigital number, since it uses as much as digits as its factorization.

5245638889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16588800, while the sum is 58.

The square root of 5245638889 is about 72426.7829535456. The cubic root of 5245638889 is about 1737.5319402993.

The spelling of 5245638889 in words is "five billion, two hundred forty-five million, six hundred thirty-eight thousand, eight hundred eighty-nine".