650216449 has 2 divisors, whose sum is σ = 650216450. Its totient is φ = 650216448.

The previous prime is 650216447. The next prime is 650216473. The reversal of 650216449 is 944612056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649230400 + 986049 = 25480^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 650216449 - 2¹ = 650216447 is a prime.

Together with 650216447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (650216447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325108224 + 325108225.

It is an arithmetic number, because the mean of its divisors is an integer number (325108225).

Almost surely, 2^650216449 is an apocalyptic number.

It is an amenable number.

650216449 is a deficient number, since it is larger than the sum of its proper divisors (1).

650216449 is an equidigital number, since it uses as much as digits as its factorization.

650216449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 650216449 is about 25499.3421287687. The cubic root of 650216449 is about 866.3352467665.

The spelling of 650216449 in words is "six hundred fifty million, two hundred sixteen thousand, four hundred forty-nine".