650508641 has 2 divisors, whose sum is σ = 650508642. Its totient is φ = 650508640.

The previous prime is 650508637. The next prime is 650508647. The reversal of 650508641 is 146805056.

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., 329059600 + 321449041 = 18140^2 + 17929^2 .

It is a cyclic number.

It is not a de Polignac number, because 650508641 - 2² = 650508637 is a prime.

It is a super-2 number, since 2×650508641² = 846322984031333762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (650508647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325254320 + 325254321.

It is an arithmetic number, because the mean of its divisors is an integer number (325254321).

Almost surely, 2^650508641 is an apocalyptic number.

It is an amenable number.

650508641 is a deficient number, since it is larger than the sum of its proper divisors (1).

650508641 is an equidigital number, since it uses as much as digits as its factorization.

650508641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 650508641 is about 25505.0708879627. The cubic root of 650508641 is about 866.4649975700.

The spelling of 650508641 in words is "six hundred fifty million, five hundred eight thousand, six hundred forty-one".