650649577 has 2 divisors, whose sum is σ = 650649578. Its totient is φ = 650649576.

The previous prime is 650649557. The next prime is 650649589. The reversal of 650649577 is 775946056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 642926736 + 7722841 = 25356^2 + 2779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650649577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650649577.

It is not a weakly prime, because it can be changed into another prime (650649557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325324788 + 325324789.

It is an arithmetic number, because the mean of its divisors is an integer number (325324789).

Almost surely, 2^650649577 is an apocalyptic number.

It is an amenable number.

650649577 is a deficient number, since it is larger than the sum of its proper divisors (1).

650649577 is an equidigital number, since it uses as much as digits as its factorization.

650649577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 650649577 is about 25507.8336398840. The cubic root of 650649577 is about 866.5275677319.

The spelling of 650649577 in words is "six hundred fifty million, six hundred forty-nine thousand, five hundred seventy-seven".