650565997 has 2 divisors, whose sum is σ = 650565998. Its totient is φ = 650565996.

The previous prime is 650565991. The next prime is 650566003. The reversal of 650565997 is 799565056.

It is a balanced prime because it is at equal distance from previous prime (650565991) and next prime (650566003).

It can be written as a sum of positive squares in only one way, i.e., 458216836 + 192349161 = 21406^2 + 13869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650565997 is a prime.

It is a super-2 number, since 2×650565997² = 846472232905208018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650565991) 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, 325282998 + 325282999.

It is an arithmetic number, because the mean of its divisors is an integer number (325282999).

Almost surely, 2^650565997 is an apocalyptic number.

It is an amenable number.

650565997 is a deficient number, since it is larger than the sum of its proper divisors (1).

650565997 is an equidigital number, since it uses as much as digits as its factorization.

650565997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2551500, while the sum is 52.

The square root of 650565997 is about 25506.1952670327. The cubic root of 650565997 is about 866.4904625178.

The spelling of 650565997 in words is "six hundred fifty million, five hundred sixty-five thousand, nine hundred ninety-seven".