6598727489 has 2 divisors, whose sum is σ = 6598727490. Its totient is φ = 6598727488.

The previous prime is 6598727467. The next prime is 6598727581. The reversal of 6598727489 is 9847278956.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5503117489 + 1095610000 = 74183^2 + 33100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6598727489 is a prime.

It is not a weakly prime, because it can be changed into another prime (6598727419) 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, 3299363744 + 3299363745.

It is an arithmetic number, because the mean of its divisors is an integer number (3299363745).

Almost surely, 2^6598727489 is an apocalyptic number.

It is an amenable number.

6598727489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6598727489 is an equidigital number, since it uses as much as digits as its factorization.

6598727489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 65.

The square root of 6598727489 is about 81232.5519050091. The cubic root of 6598727489 is about 1875.6568947171.

The spelling of 6598727489 in words is "six billion, five hundred ninety-eight million, seven hundred twenty-seven thousand, four hundred eighty-nine".