650998489 has 2 divisors, whose sum is σ = 650998490. Its totient is φ = 650998488.

The previous prime is 650998487. The next prime is 650998499. The reversal of 650998489 is 984899056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610485264 + 40513225 = 24708^2 + 6365^2 .

It is a cyclic number.

It is not a de Polignac number, because 650998489 - 2¹ = 650998487 is a prime.

Together with 650998487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (650998483) 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, 325499244 + 325499245.

It is an arithmetic number, because the mean of its divisors is an integer number (325499245).

Almost surely, 2^650998489 is an apocalyptic number.

It is an amenable number.

650998489 is a deficient number, since it is larger than the sum of its proper divisors (1).

650998489 is an equidigital number, since it uses as much as digits as its factorization.

650998489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The square root of 650998489 is about 25514.6720339494. The cubic root of 650998489 is about 866.6824323726.

The spelling of 650998489 in words is "six hundred fifty million, nine hundred ninety-eight thousand, four hundred eighty-nine".