649548617 has 2 divisors, whose sum is σ = 649548618. Its totient is φ = 649548616.

The previous prime is 649548607. The next prime is 649548619. The reversal of 649548617 is 716845946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 488233216 + 161315401 = 22096^2 + 12701^2 .

It is a cyclic number.

It is not a de Polignac number, because 649548617 - 2¹⁰ = 649547593 is a prime.

It is a super-3 number, since 3×649548617³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 649548619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649548619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324774308 + 324774309.

It is an arithmetic number, because the mean of its divisors is an integer number (324774309).

Almost surely, 2^649548617 is an apocalyptic number.

It is an amenable number.

649548617 is a deficient number, since it is larger than the sum of its proper divisors (1).

649548617 is an equidigital number, since it uses as much as digits as its factorization.

649548617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 649548617 is about 25486.2436816413. The cubic root of 649548617 is about 866.0385432125.

The spelling of 649548617 in words is "six hundred forty-nine million, five hundred forty-eight thousand, six hundred seventeen".