649143617 has 2 divisors, whose sum is σ = 649143618. Its totient is φ = 649143616.

The previous prime is 649143587. The next prime is 649143647. The reversal of 649143617 is 716341946.

It is a balanced prime because it is at equal distance from previous prime (649143587) and next prime (649143647).

It can be written as a sum of positive squares in only one way, i.e., 641912896 + 7230721 = 25336^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 649143617 - 2¹⁶ = 649078081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649143647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324571808 + 324571809.

It is an arithmetic number, because the mean of its divisors is an integer number (324571809).

Almost surely, 2^649143617 is an apocalyptic number.

It is an amenable number.

649143617 is a deficient number, since it is larger than the sum of its proper divisors (1).

649143617 is an equidigital number, since it uses as much as digits as its factorization.

649143617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 649143617 is about 25478.2969799789. The cubic root of 649143617 is about 865.8585112519.

The spelling of 649143617 in words is "six hundred forty-nine million, one hundred forty-three thousand, six hundred seventeen".