650649613 has 2 divisors, whose sum is σ = 650649614. Its totient is φ = 650649612.

The previous prime is 650649611. The next prime is 650649647. The reversal of 650649613 is 316946056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 588208009 + 62441604 = 24253^2 + 7902^2 .

It is a cyclic number.

It is not a de Polignac number, because 650649613 - 2¹ = 650649611 is a prime.

Together with 650649611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650649611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325324806 + 325324807.

It is an arithmetic number, because the mean of its divisors is an integer number (325324807).

Almost surely, 2^650649613 is an apocalyptic number.

It is an amenable number.

650649613 is a deficient number, since it is larger than the sum of its proper divisors (1).

650649613 is an equidigital number, since it uses as much as digits as its factorization.

650649613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 650649613 is about 25507.8343455496. The cubic root of 650649613 is about 866.5275837133.

The spelling of 650649613 in words is "six hundred fifty million, six hundred forty-nine thousand, six hundred thirteen".