650505997 has 4 divisors (see below), whose sum is σ = 651366076. Its totient is φ = 649645920.

The previous prime is 650505937. The next prime is 650506007. The reversal of 650505997 is 799505056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229189321 + 421316676 = 15139^2 + 20526^2 .

It is a cyclic number.

It is not a de Polignac number, because 650505997 - 2²³ = 642117389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650505937) 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 in 3 ways as a sum of consecutive naturals, for example, 428904 + ... + 430417.

It is an arithmetic number, because the mean of its divisors is an integer number (162841519).

Almost surely, 2^650505997 is an apocalyptic number.

It is an amenable number.

650505997 is a deficient number, since it is larger than the sum of its proper divisors (860079).

650505997 is an equidigital number, since it uses as much as digits as its factorization.

650505997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860078.

The product of its (nonzero) digits is 425250, while the sum is 46.

The square root of 650505997 is about 25505.0190550801. The cubic root of 650505997 is about 866.4638236493.

The spelling of 650505997 in words is "six hundred fifty million, five hundred five thousand, nine hundred ninety-seven".